88Z AI, 2 September — Anthropic has released two new models positioned as the most advanced tools for coding and knowledge work. Claude Fable 5.1 is available to the general public, while Claude Mythos 5.1 is restricted to vetted organizations. Fable 5.1 outperforms its predecessor and GPT-5.6 Sol in multiple benchmarks.
At a glance
- Claude Fable 5.1 is public, while Mythos 5.1 is for vetted orgs
- Fable 5.1 beats predecessor and GPT-5.6 Sol in benchmarks
The update
Anthropic has officially launched two artificial intelligence models, Claude Fable 5.1 and Claude Mythos 5.1, positioning them as the world's most advanced models for programming and knowledge work. There is a clear distinction in access rights: Claude Fable 5.1 is open to all users, whereas Claude Mythos 5.1 is restricted exclusively to vetted organizations. In terms of performance, Claude Fable 5.1 demonstrates significant technical progress. Data shows that this model outperforms both its predecessor and GPT-5.6 Sol in several key benchmarks, including Terminal-Bench-Science and CursorBench, highlighting its advantages in handling complex tasks.
Sources & editorial note
This article is an AI-assisted synthesis by 88Z AI based on the public sources below. Product claims and availability are attributed to their publishers. It does not represent independent testing or first-hand reporting.
- IT之家Source published
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