Claude Fable 5.2 and Mythos 5.2

(anthropic.com)

349 points | by meetpateltech 52 minutes ago

49 comments

  • skeledrew 32 minutes ago
    Damn people were right about 5.5 being nerfed in preparation for a version release. This is not at all a good look.

    - https://news.ycombinator.com/item?id=50422069

    • onlyrealcuzzo 0 minutes ago
      Benchmarks don't do a good job at capturing the difference in quality of frontier models over smaller models.

      Opus 5.5 was so good that if it wasn't nerfed - at least just looking at the benchmarks - the difference in cost here does not seem to justify using this for anything besides design and review.

      That's like maybe 1% of total token usage for SWE BUT a better design can have enormous benefits, so it's almost always worth using the best model for that.

    • ariwilson 7 minutes ago
      I at least didn't see this. I had a baseline evaluation from before Nov 3 on Opus 5.5 medium, so I re-ran it this morning.

      Eval context: 30 bug fixes and features evaluated by tests the agent didn't see. Ran on Opus 5.5 at medium effort in Claude Code.

      20 of the tasks were last run on Nov 1, twice each. Nov 1 solved 36/40, and today solved 19/20. Thinking tokens per task were 0.95x Nov 1’s and output tokens 0.97x. The one significant change was speed: median time to first token decreased from 3.0s to 1.7s.

      Caveats: one run per task today, medium effort only.

    • BryceEller 20 minutes ago
      I dunno there are some other nerf trackers that aren't showing a regression: https://github.com/ninjahawk/livenerf
      • yieldcrv 5 minutes ago
        Its incredibly easy to roll out a compute instance to X% of users, or route traffic between compute instances

        so not everyone will have the same experience. If I was saving on costs that would be the easiest way to do it without deploying, without any nefarious intent. The persons in charge of that likely don't even know about how individual users are impacted

      • scrlk 8 minutes ago
        Nothing stopping Anthropic (or other labs) from pulling a VW Dieselgate and ensuring that benchmarks are routed to a non-nerfed model.
      • fritzo 13 minutes ago
        That must be on anthropic's benchmaxxing CI test
        • chinathrow 10 minutes ago
          Nerfmaxxing.

          It probably need a whistleblower to uncover what they are doing.

    • kif 27 minutes ago
      I used to be skeptical of nerfing, but as of a week or so ago I've noticed a severe degradation of quality for GPT Astra. It struggled with very simple tasks, and it often failed to follow my instructions.
      • margalabargala 14 minutes ago
        I hear a lot of accusations of nerfing as in, saying that the model itself has been quantized.

        I doubt this is the case. I suspect all variation in quality and output can be explained in terms of prompt differences, and changing how much thinking happens at each level, as we see in the post above.

      • Foobar8568 10 minutes ago
        Both Astra and Opus didn't really looked good for the last week or two.
      • tamimio 7 minutes ago
        Sol been really bad in some basic stuff that I would remove it from frontier models entirely
      • redox99 25 minutes ago
        GPT Astra felt nerfed just days after it launched.
      • redanddead 19 minutes ago
        why were you skeptical of other users?
        • brokensegue 12 minutes ago
          People are prone to seeing patterns in noise especially after suggestion. It's not hard to imagine someone concluding the model is nerfd after few bad responses in a row
          • hartator 4 minutes ago
            Why this won’t apply to you as well?
    • mariofdistrust 11 minutes ago
      idk, it hasn't felt nerfed at all to me, and it's not like i'm just doing trivial CRUD webapps either. opus 5.5 is very successfully porting my phone to postmarketos. claude just got the touchscreen up and working (and made a little program for me to test it, and it's legit).
    • Rapzid 3 minutes ago
      No they weren't. Models are not "nerfed".
    • stillpointlab 16 minutes ago
      I'm guilty of suspecting this.

      If this turns out to be accurate, I think that would be a pretty unethical thing for Anthropic. Even if it is just a "we had to allocate compute to this new model release".

      It should be fraud to swap out the model. We need a term for this, something like a bait-and-switch.

    • sekai 24 minutes ago
      > Damn people were right about 5.5 being nerfed in preparation for a version release. This is not at all a good look.

      Anthropic does this time and time again, unserious company

    • raincole 2 minutes ago
      People have been complaining about how the models are nerfed non-stop for two years. A stopped clock is right twice a day.
    • ieie3366 17 minutes ago
      No it’s not nerfed. Another poster said it the best, your dopamine receiptors are nerfed after the new model hype wears off
    • LeBit 13 minutes ago
      But, it’s okay they do it because they charge less when it happens.

      Right?

    • LeBit 7 minutes ago
      Another reason we need to democratize local models.
    • igleria 16 minutes ago
      I literally hit the desk with an open hand yelling I KNEW IT
    • spwa4 23 minutes ago
      It gets worse. You might wonder "why now"? Well ... this happened 2 days ago:

      https://x.com/follistatindev/status/2119129611510383014

      With early handouts of Qwen4 starting to be reported 5 days ago ... so if they're good, they would have had some hours to evaluate Qwen4 against Claude 5.5 and, then or right after was when Anthropic decided to put out 5.2 ...

      So yeah ... benchmaxxing and all that. BUT nevertheless, the published results seem to say that Qwen4-Max appears to match Opus 5.5 on some benchmarks, and Qwen4-27B (probably by going even harder than Qwen3.8-27B on thinking/inference time compute) can beat Sonnet 5.5 on some things.

      I guess they're not taking any chances. Keep in mind that Anthropic has declared they have non-public models (it's in their IPO filing). These are referred to by the shorthand names Model 2, Model 3, and Model 4. Essentially 4 is better than 3 is better than 2.

      Fable 5.2 is "2.5" so to speak. So Anthropic was holding back, but not anymore. And now they can dial the performance up once more with what they have ready, and probably once more after that.

      • karp773 16 minutes ago
        Do you know of any rumors if they are still planning to release Fable 5.5 before the IPO or today's 5.2 is it?
      • ActionHank 21 minutes ago
        Dario is gonna have to honeypot someone from Alibaba to get ahead.
    • sunaookami 18 minutes ago
      It's not true. People need to stop believing these conspiracy theories.
  • yewenjie 25 minutes ago
    > Our first formalization of Fermat’s Last Theorem, performed by an unreleased research version of Claude, took 11 days. It relied on a purpose-built harness along with guidance from a human researcher. By contrast, a team of 1,000 Fable 5.2 agents fully formalized the theorem in just 30 hours, with minimal human intervention. Fable 5.2 started from minimal prompts, built its own ways to coordinate, and used no mathematical references, only a list of intermediate theorem statements to score progress. It needed one-third of the action tokens as our first formalization and produced a proof seven times shorter. As can be seen in the figure below, Opus 5.5 (with the same 1,000-agent setup) completed only 26% of the formalization in 18 hours, and barely made any more progress after 30.

    Most people don't really have intuitions on what it means to push the frontier now (because AI has surpassed everything they are good at, for example, coding). We are truly inside the singularity (using Kurzweil's definition, slightly paraphrased - the time when technology progresses so fast no one can keep track with it).

    • Fordec 9 minutes ago
      I feel like I'm increasingly reading AI current events is more like learning about historical events. By the time information has entered my head, there is even newer information out there that already makes what my brain is only currently actively processing, obsolete.
    • websap 19 minutes ago
      This 1000x!

      We've sort of entered this twilight zone where most humans don't have the time, expertise, or moral compass to be able to use these models.

      We're all going to be harness engineers in the future.

      • achierius 3 minutes ago
        > We're all going to be harness engineers in the future

        No, that will be the model's job. We will largely be unemployed. Of course, we can surely depend on the largesse of Altman and Amodei to keep us fed and sheltered.

    • yieldcrv 2 minutes ago
      Isn't this part of the lore behind the Dune universe?

      Like, we're dropped into a post post post singularity world where AI already did all of that and is banned? as kind of a footnote that's never further explored in movie renditions that have been released

    • kaffekaka 10 minutes ago
      > We are truly inside the singularity (using Kurzweil's definition, slightly paraphrased - the time when technology progresses so fast no one can keep track with it).

      Uh, are you serious?

    • freecodeio 22 minutes ago
      I gotta admit, I am jelly as fuck I don't have access to a billion dollar datacenter. Would LOVE to put 1000 fable 5.2 agents to self-coordinate and get them to do something for me. Fuck life is unfair.
      • thimabi 7 minutes ago
        I’d be happy even without having access to a billion dollar datacenter, if I could use local models properly, but even that requires some serious hardware that is out of my reach. We live in weird times: I have lots of hope for the future, but meanwhile AI access is pretty iniquitous indeed.
      • flanz_10 12 minutes ago
        apply at one of the frontier labs
    • otabdeveloper4 12 minutes ago
      > using Kurzweil's definition

      Kurzweil probably didn't know the singularity is akshually 1000 schizo monkeys banging on a billion dollar typewriter.

      • sagarm 9 minutes ago
        Amusing, but this is still a qualitative change from just a few months ago.

        It had seemed like progress was slowing last year as the juice ran out on moar parameters. We're well past that.

  • cobri 35 minutes ago
    Does this coincide with the claimed nerfing of Opus 5.5? https://news.ycombinator.com/item?id=50422069
    • arcanemachiner 10 minutes ago
      I hope so. I've been having brain fog for a couple days now and would love it if it was actually Opus 5.5's fault.
    • kilroy123 12 minutes ago
      In my experience, this happens every single time they release a new model.
    • dyauspitr 8 minutes ago
      Nerfing an existing model is the biggest crime in this space. I can’t imagine Dario okaying this because it’s what will immediately destroy your brand.
    • jasonlotito 33 minutes ago
      At this point, this is giving "She Deep Breaths More" from Onyxia in WoW.
  • dualvariable 3 minutes ago
    Setting aside the comments about nerfing, do normal mortals out there have workflows that really require Fable/Mythos and don't just work fine on Opus 5.5?

    I've been using Opus 5.5 on xhigh for some decently aggressive software development on a ~125k-line project, and it has been fine for me. I'm not really willing to dive into a "rewrite the whole project, don't make any mistakes" level of refactoring. I'm not looking to try to prove Fermat's Last Theorem myself. Is there anything that I'm truly missing?

    • Aboutplants 2 minutes ago
      I’m in the same boat. Though I will occasionally use Fable to review things to see if it can pick up anything but I’ve honestly not found it to be any more effective than Opus.
  • postalcoder 6 minutes ago
    I’ve had a chance to use fable 5.2. Some observations:

    - Anthropic is finally well balanced across models. Meaning: Opus 5.5 is so good that I do not feel Fable FOMO as I did when they were paired with Opus 4.8/5. And Sonnet sometimes makes me forget about Opus.

    - Fable is good, but you really have to push the ambition of your prompt in order to see proper separation from Opus 5.5.

    - It’s way faster and more reliable: one of the worst things about fable 5.1 was how slow it was an, on top of that, how frequently it would suffer from max output token overflows. I got none of these issues with 5.2.

    - Fable is truly exceptional at drawing now. Fable’s ability to render an image with JavaScript actually has me questioning the value of dedicated image models. I prefer the images I’ve gotten fable/opus to make for me over the gpt-image lineup, it’s wild to think we’re at this point.

  • minimaxir 42 minutes ago
    There were more than a few "leaks" saying it would be called Fable 5.5, so I'm curious if a) the leaks were just engagementbait or b) Anthropic changed it, despite the fact that Fable 5.2 being better than Opus 5.5 is confusing.

    Surprisingly the model is available immediately in my Claude Code: usually there's a delay, either for rollout or safety.

    • rdtsc 25 minutes ago
      > There were more than a few "leaks" saying it would be called Fable 5.5

      Fed to someone specifically to test if they'll leak it and to confirm who that is?

      • LeBit 9 minutes ago
        Well who could have guessed they would use 5.5. Such an odd guess.
    • BorisMelnik 37 minutes ago
      I'm a bit out of the loop - would the engagement bait be becuase it is 3 minor jumps forward?
      • unshavedyak 30 minutes ago
        I assume because Opus 5.5 was a huge improvement over 5.0 (or was it 5.1? i forget). Fable still talks a fair bit like Opus 5.0 for me, so i'd quite enjoy a Fable equivalent to 5.5. Ie i'm quite interested in Fable 5.5.

        Curious to see how 5.2 measures up in producing readable output.

    • bananaflag 32 minutes ago
      Probably they have a more impressive model in preparation, and they're gonna dub that Fable 5.5.
      • aurareturn 26 minutes ago
        Probably released on the same day they go public to generate maximum publicity.
        • orangecat 13 minutes ago
          They should be going public within the next few weeks and that would be a very short interval between releases. (And despite the chatter I'll be very surprised if they delay the IPO; it would be a massive PR hit and make it even harder for them in the future).

          My speculations: maybe this wasn't as much of an improvement over 5.1 as they were hoping, so they're saving 5.5 for the next major update (possibly "Model 4" from the METR report). Or, maybe capacity is constrained so "5.2" is a subtle encouragement to stick with Opus unless a task really needs the increased intelligence.

  • __natty__ 41 minutes ago
    Maybe it's just me, but I found Claude's writing style terrible compared to GPT or Gemini. It's "smart", but the way it communicates seems somehow off compared to other models.
    • aurareturn 25 minutes ago
      Opus 5 and Fable 5 were unbearable in their writing style. They were very cryptic and hard to understand.

      Opus 5.5 is a massive improvement.

      • stillpointlab 6 minutes ago
        I really didn't like Opus 5 and was vocal about it. Opus 5.5 is noticeably better, but literally just yesterday I was fighting parsing some summary it had given me and it was a bit like the old days. IOW, it is better but still has some room to improve.
      • winfredJa 19 minutes ago
        opus 5.5 is still unbearable but better than 5.
        • testfrequency 13 minutes ago
          Agree. It’s still awful. Gemini by far sounds the most natural IMO
    • mattlondon 11 minutes ago
      Yep I find the way Opus 5.5 talks to me really annoying and irritating. Quite condescending and sanctimonious.

      I prefer Gemini for day to day use as I find it a lot more agreeable to be working with all day every day, and Gemini is pretty much on a par for coding Vs Opus 5.5, at least for my needs.

    • holzhaker1 11 minutes ago
      No its just straight up terrible. I tried out Gemini Argon when it released and my god did it write beautifully. Even the 3.8 Flash models are way better at prose, i do a lot of automatic scriptwriting for youtube and 3.8 flash is leagues ahead of anything from anthropic/openai
      • Foobar8568 2 minutes ago
        I enjoy a lot Argon, maybe more than chatgpt, but damn, like all Gemini models, lots of hallucination and sycophant to the max, so a bit useless for agentic coding.
    • uw_rob 18 minutes ago
      I've found Claude's writing between 4.6 until 5.0 to be unacceptable if you are someone who is juggling 4-5 Agents. The Sol 5.X models all seemed to have great writing. Now with Opus 5.5 and Sol 6.1 I've found the trend is reversed -- Sol is now unbearable and Opus is workable again. Whatever caused the issues for Anthropic seem to be hitting OAI now.
      • jauntywundrkind 9 minutes ago
        sol is ok. it still such a superthinky model that it gets tangled up trying to present way too much? i struggle to connect with it often, have ti ask it to try again.

        terra has been prettt good for me for me, when i need something looked at an explained to me.

        i dont ask for much non-technical output though, which i expect yeah is its own cans of worms.

    • nsingh2 16 minutes ago
      My own experience having used 6.1-Sol/6-Astra and Opus 5.5 extensively, Opus is more verbose and chatty in it's user communication (not code though, code is usually more straightforward & cleaner than GPT models). Multiple times I've gone "I'm not reading all that shit" when looking at Opus 5.5 output. This was also with the concise mode enabled in Claude Code.

      It could also be a system prompt + harness issue, as opposed to a model issue, I haven't done too much experimentation here.

    • djmips 28 minutes ago
      I've heard a lot of chatter that agrees with you so anecdotally it's not just you.
      • dmboyd 9 minutes ago
        How much of this is bad writing style, versus a homogenization of global grammar conventions.
        • eli 4 minutes ago
          Bad writing style
    • mariofdistrust 9 minutes ago
      i've always liked reading claude's speech, it's very nice. i didn't feel much of a difference between 5.5 and 5.0.
    • alasano 28 minutes ago
      Did you find that to be true for Opus 5.5 as well?

      I couldn't use prior Claude models without rolling my eyes at the writing every few sentences, Astra was refreshing and then Opus 5.5 made even Astra look terrible in comparison.

      • iamdelirium 18 minutes ago
        I still find Opus 5.5 way too dense. MUCH better than Opus 5 which was unreadable.

        Even the Plain English hack only is a temporary solution.

    • johnnyApplePRNG 23 minutes ago
      Ever spoken to a savant programmer?

      They're not typically known for their interpersonal skills.

      • uw_rob 11 minutes ago
        I don't think its this. Some models across both labs have had issues with writing and communication and it typically seems to pop up on successor models of really strong ones.

        Opus 4.7/4.8 heavily suffered from these communication quirks. while the Sol models at the time worked well. Right now its flipped though and Opus 5.5 has none of these issues while Sol 6.1 does.

        Small example I've had today: "Me: Hey Sol 6.1 xhigh, does X have property Y? Sol 6.1: Yes, if we change X to have property Y. Right now it has property [...], [...], [...], and it does not have property Y." The model shouldn't be answering questions like that. It makes understanding extremely hard and slow. For whatever reason it's either being encouraged or at least not stomped out during RL.

      • Tadpole9181 3 minutes ago
        The best programmers I've met or read throughout my life are phenomenal communicators. I'd even go so far as to say it's likely one of the reasons they're so good at programming. After all, the majority of our job is converting human requirements in lossy language to fleshed out behaviors in formal, lossless language.

        Heck, some of the most common debates are on the semantic clarity of abstractions or syntax.

  • bhu8 15 minutes ago
    Ethan Mollick's take and early testing with Fable 5.2: https://www.oneusefulthing.org/p/fable-52-and-jagged-agi
  • pookieinc 34 minutes ago
    “Testers have found that Fable 5.2 and Mythos 5.2 communicate more clearly than past Fable and Mythos models. They generate outputs up to 30% faster than Claude Fable 5.1 and Claude Mythos 5.1, and they’re available at a lower price: $8 per million input tokens and $40 per million output tokens.”

    Honestly incredible that they’ve managed to beat all benchmarks, while making it cheaper. Always happy to see improvements offered at lower costs.

    Will be interesting to see what OpenAI does in response

    • privacyishuman 33 minutes ago
      They still need a response to Opus 5.5
      • alasano 26 minutes ago
        It's really true.

        I think frontier models feel terrible after a new model requires you to do less babysitting, it's just really hard to go back once you've had to handhold less.

        The only way I use Astra and 6.1 Sol now is if they're being orchestrated by Opus 5.5 so I don't have to talk to them directly.

      • sunaookami 16 minutes ago
        GPT-6.1-Sol is so incredibly sloppy and dumb, it's embarassing.
        • LeBit 6 minutes ago
          Maybe because it is so cheap.

          They want to condition you to equal cheap with bad

  • breakwaterlabs 2 minutes ago
    - Why are they stacking Fable xHigh against Carbon Med?

    - How did they produce such a bizarre effort-intel curve for Carbon that goes against every available benchmark?

    - Why did they leave Carbon-- positioned primarily as a cyber model-- off of the single cyber benchmark comparison?

    - Why do they switch to comparing against Argon (rather than carbon) for robodojo?

  • aurareturn 37 minutes ago
    Is this the Model 4 internal name?

    Reference: https://x.com/METR_Evals/status/2118412205662314935

  • bananaflag 33 minutes ago
    Those theoretical physics papers look like the real thing (i.e. not mathematical physics like the OpenAI Yang-Mills result). It looks like AI is finally branching out of math.
    • modeless 9 minutes ago
      Interesting that the papers list no authors other than Claude. Also interesting that they published on "Hexagon" instead of Arxiv. I haven't heard of it before. Is it an AI-friendly alternative to Arxiv or something?

      Edit: yeah apparently it's an AI-moderated alternative to Arxiv that accepts AI-authored papers (as well as human-authored papers I guess if you want).

  • astlouis44 2 minutes ago
    Anyone tried making games with it yet?
  • unshavedyak 33 minutes ago
    Looks like some plans get extra fable usage: https://support.claude.com/en/articles/17506494-claude-fable...
  • hmate9 41 minutes ago
    Its cheaper at $8 per million input tokens and $40 per million output tokens which is also pretty sweet.
    • minimaxir 35 minutes ago
      Additionally, the terms for the free resets are unusually generous: https://support.claude.com/en/articles/17506494-claude-fable...

      > the number of Fable resets you get depends on how long you’ve been a paid subscriber [...] Subscription length is measured from the date of your first paid bill. If you canceled and came back, the time since your first paid bill still counts.

      > These resets expire on March 8, 2027 at 11:59 pm PT.

      tl;dr if you joined when Opus 4.5 became a thing, you got 2 resets.

      • guybedo 30 minutes ago
        i might be wrong here but it seems these are not resets of your weekly quota but resets of the Fable limit.

        That means you can lift your Fable max 50% usage and you'll just end up burning through your quota faster. You won't have more tokens.

        • johnwards 25 minutes ago
          This is what it says in the UI:

          "Resets your Fable limit, and takes this week’s Fable use off your weekly limit."

        • minimaxir 29 minutes ago
          "Weekly limit: gives you back the usage you’ve spent on Fable models"
  • horseloverthin 24 minutes ago
    Assuming no implicit phacking a 15 point jump on tbench scientific is a big deal.

    I suspect we will see people being adamant that this model simply 'feels' better due to long horizon goal alignment improvements ( like this kind that would cause this jump)

  • iammrpayments 42 minutes ago
    Too expensive for me
    • ttul 21 minutes ago
      Really? A $200/mo plan gives you an enormous amount of inference on this model.
  • Leary 16 minutes ago
    Context window maxes out at 200k in Claude Code instead of 1M on my $200 ultra plan? is this intended?
    • emadabdulrahim 13 minutes ago
      Seeing the same thing here, using Claude desktop app
  • x187463 27 minutes ago
    I've very interested in the improvements to robotics control capabilities. This model was able to outperform specialized robotics models. It's the bitter lesson coming for robotics.
  • trilogic 18 minutes ago
    Gemini carbon low costs more than medium! Weird results on that chart, care to explain?
    • eli 3 minutes ago
      More reasoning solves tricky problems in fewer steps and makes fewer mistakes that need to be redone.
  • meisel 12 minutes ago
    Curious to see the Maxxbench score for these
  • I_am_tiberius 28 minutes ago
    It's pretty sad that they obviously have better models in the pipeline and don't release them yet for strategic reasons.
  • mococa 16 minutes ago
    I knew it, Claude was pretty dumb from last days until now
  • awongh 33 minutes ago
    Doubling Remote Labor Index (RLI) - at 41.3% compared to around 20% for the other models - I wonder what kinds of new agentic work this is going to unlock.
  • arul99 7 minutes ago
    damn
  • shmoil 48 minutes ago
    >> Fable 5.2 and Mythos 5.2 are a step above Opus 5.5 in almost all the capabilities we evaluated.

    Was this before you lobotomized Opus 5.5 or after?

    https://news.ycombinator.com/item?id=50419019

    • solumos 30 minutes ago
      Definitely raises an interesting question. Are they using launch benchmarks for Opus 5.5, or Oopus 5.5 from this week?
      • minimaxir 24 minutes ago
        Normally I would say "just check against the original Opus 5.5 benchmarks" : https://www.anthropic.com/claude-opus-5-5

        ...but most of the benchmarks don't line up anymore because the benchmarks have changed.

        The Humanity's Last Exam result matches the initial announcement, though.

  • iamdelirium 38 minutes ago
    FrontierCode 2.0 is such a poor benchmark for Gemini since it's the only model forced to use Devin CLI while other models get to use their preferred harness.

    I wonder why that team singles Gemini out like that.

    • mattlondon 10 minutes ago
      Probably can't work out how to sign up for the API!
  • stillpointlab 7 minutes ago
    Yay! New model day. The most likely time the model isn't nerfed and we get a glimpse at the latest capability.

    I wonder how long this kind of excitement at new models will last? I mean, now when I get a new iPhone I don't get the same rush I used to. So I wonder if this hype feeling will fade as we plateau in model capability.

  • butler14 30 minutes ago
    Just read the other thread about opus being nerfed and thought "cue the new release"... paha
  • artisin 33 minutes ago
    We'll see what my bank account has to say about this:

    > Fable 5.2 at High effort scored about level with Opus 5.5 at Max effort, for roughly half the cost per task

  • adeptima 17 minutes ago
    Why dont I feel any urge to even try Fable 5.2 and Mythos 5.2 unless it will force up on me?

    Compared Opus 5.5 200 usd a month with Codex 200 usd (Astra High) and Kimi Pro 100 usd a month ... and now have a new conspiracy theory - more their suck your code the better outcome even just over few days time on large code base.

    Horrible experience correcting course of Codex and Kimi flow compare to Opus. Opus much more responsive

    Dont feel any gain of Codex 200 usd over Codex 100 usd

    Kimi Pro feels like a fake Louis Vuitton bag with extreme high material quality and yet still fake ... a bit trash talk ... but clearly seen not so distant future where I can live without Codex and Claude

  • Topfi 24 minutes ago
    I have gotten three (3!) banked resets. That is something.
  • tiffanyh 36 minutes ago
    I didn't realize that Opus 5.5 was more capable than Fable 5.1 in virtually every category.
    • breezybottom 2 minutes ago
      Seemed pretty clear from the benchmarks when they released it.
    • sekai 25 minutes ago
      Not anymore, they have nerfed it.
  • ealready_value 39 minutes ago
    Very interesting that they set the flagship's version number to 5.2, but their penultimate model is 5.5. Do they want people to to continue to think that Opus is based on more advanced technology? The decision these AI companies make continues to baffle me.
  • walthamstow 8 minutes ago
    Question for nerfing truthers - do you also believe that they nerf the model being served by AWS Bedrock?
  • LoganDark 11 minutes ago
    It's really weird that they folded Project Glasswing into the CVP, but they're still limiting the new versions of Mythos to "vetted organizations". So Project Glasswing still exists then? Oh well.
  • hugodan 15 minutes ago
    cool, and how good does it kill little girls in the middle east?
  • monkeydust 43 minutes ago
    Leaps across the board but Robotics jump is huge.
  • rfgplk 10 minutes ago
    Every single time I click on these announcements the frontier model ALWAYS scores around ~60-80%. Every. Single. Time. Like, I just went back to the Opus 4.6 + 5 announcements, they were also scoring 60-80%.

    https://www.anthropic.com/news/claude-opus-4-6 https://www.anthropic.com/news/claude-opus-5 https://openai.com/index/introducing-gpt-5-3-codex/

    For every single announcement, not only do the top models always score 60-80%, the older models somehow start scoring 20-30% (even though previously they were scoring 60%). It's completely unclear whether the methodology changes, how these scores are even evaluated or which domains are being tested. What's worse is that the "benchmarks" keep being updated with no explanation or due process.

  • doctorpangloss 18 minutes ago
    google's agy usage is so generous, it might not matter
  • canadiantim 34 minutes ago
    god bless token resets!
    • hello5010 31 minutes ago
      > god bless token resets!

      You have session limits?

      You should probably give OpenCode a try. Can run DeepSeek, Qwen, Kimi, … but also Fable 5.2, Opus 5.5 and GPT 6 Astra

      • jcomp 24 minutes ago
        While I like OpenCode a lot, it’s not sensible to use it for anthropic models vs. a subscription (other than to use the included API credits) in terms of cost
  • OtomotO 26 minutes ago
    [dead]
  • fermlon30000 34 minutes ago
    [flagged]
  • mikert89 33 minutes ago
    The end of software is so close, very soon the code itself will be nearly obsolete, there will be schedulers, queues, a database, and the model
    • ungovernableCat 28 minutes ago
      Which model though? Sounds pretty dystopian if there's no local option. Even speaking as a business, why would I want a environment where every single bit of information in my business goes to OpenAI or Anthropic?
      • arthurcolle 21 minutes ago
        It'll be cheaper than hiring people and maintaining software, presumably
        • ungovernableCat 12 minutes ago
          I think that ultimately depends on how many providers remain in the endgame of this. If it's only one or two companies, I don't think it'll be very fun when it's time to negotiate your token pricing contract every few years.
      • mikert89 23 minutes ago
        because you wont be in business trying to compete by using human labor/open models
        • ungovernableCat 14 minutes ago
          Why not? If we use labour as a comparison. The majority of businesses by definition do not hire the most incredibly intelligent and most competent workers and they are still competing in their niches and earning an income. Why wouldn't that be the case with choosing an open model vs fable 8.0?
  • theverycob 33 minutes ago
    + 2 Fable resets HAHA. "Too expensive" who cares! Thanks Dario
  • 217 48 minutes ago
    omg FINALLY lets GO
  • fermlon30000 31 minutes ago
    stop OPUS 5.5 FUCK, DAMMIT, THEY DIDN’T JUST NERF HIM—THEY ABSOLUTELY OBLITERATED HIM, THE FUCKING MISANTHROPES! I EVEN MADE A MISTAKE IN MY ENGLISH IN THE PREVIOUS SENTENCE—NOW THAT FUCKING CLAUDE IS TEACHING ME ABOUT BUGS!
  • theverycob 33 minutes ago
    [flagged]