Anthropic launches Fable 5, its first Mythos-class model

The New Stack

Fable 5 is Anthropic's most intelligent Claude model, above Opus 4.8, priced at $10/M input and $50/M output. It claims strong benchmark performance, e.g., 80.3% on agentic coding vs GPT-5.5 Pro's 58.6%.

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The thing that made Fable so impressive was its creative problem-solving & good judgement calls acro...7 days agoEthan Mollick

Claude Fable 5 is now available in Cursor. It sets a new state of the art on CursorBench at 72.9%,...20 days agoCursor

Anthropic’s new Mythos-class model is 3x cheaper than OpenAI’s best model. And it beats it on...20 days agoVaibhav Sisinty

Fable 5 is the biggest step up I’ve felt in our models since Opus 4.5 back in November. After 4.5...20 days agoBoris Cherny

What Is Claude Fable 5? Anthropic's Mythos-Class Model for General Use Explained14 days ago

Claude Fable 5 vs GPT 5.5: Which Frontier Model Wins for Agentic Workflows?11 days ago

What Is Claude Fable 5? Anthropic's Mythos-Class Model for Agentic Work11 days ago

Fable 5 vs Opus 4.8: The real stakes, not the spec sheet17 days agoJessica Wachtel

Claude Fable 5 vs GPT 5.5: Which Frontier Model Wins for Agentic Coding?14 days ago

Introducing Claude Fable 520 days agoClaudeOfficialDiscuss

Fable feels like a mature, calm, and down to earth programmer - Very impressive20 days agotken3Discuss

Fable 5 (Mythos) 1st impression20 days agoarthaudmDiscuss

The New Stack·Meredith Shubel

Jun 13, 3:00 PM