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原文
Andrej Karpathy· @karpathy · X·· 2026-06-10精选AI 评分90
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Andrej Karpathy 宣布 Claude Fable 5 发布,指出其为加设安全护栏的 Mythos 底层模型。该模型在几乎所有测试基准上达到 SOTA 水平,在软件工程和复杂长任务上表现尤为突出。Karpathy 认为其体验比 Claude 4.5 有代际飞跃,但也指出安全护栏触发较频繁,需通过时间优化。

推荐理由

原文明确了Claude Fable 5与Mythos模型的关系及SOTA基准表现,并对比了它与Claude 4.5的版本变化量级。

正文

This is a super exciting release - Claude Fable 5 is the same underlying model as Mythos but with added safeguards. The benchmarks are great and it's SOTA on everything by a margin but I'll add that *qualitatively* also, this is a major-version-bump-deserving step change forward (imo of the same order as Claude 4.5 was in November), peaking especially for long problem-solving sessions on very difficult problems. You can give it a lot more ambitious tasks than what you're used to, the model "gets it" and it will just go, and it's never felt this tempting to stop looking at the code at all (but don't do this in prod!). The model still has quirks that people will run into and the safeguards are configured to be a little too trigger happy for launch, which can hopefully be tuned over time.

I feel a lot of things changing as working software increasingly comes out on a tap. The Jevon's paradox kicks in and I feel my own demand for software growing substantially. You can ask for anything - explainers, visualizers, dashboards, bespoke single-use apps (e.g. a full wandb that is hyper-specific just for your project), you can 10X your test suite, auto-optimize code, run giant research projects with custom HTML for the results, anything! "Free your mind" (Matrix ref). Really looking forward to all the things people build!

引用Claude@claudeai
Fable 5 is state-of-the-art on nearly all tested benchmarks, with exceptional performance in software engineering, knowledge work, scientific research, and vision. The longer and more complex the task, the larger Fable 5’s lead over our other models.
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来源:Andrej Karpathy · x.com