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Models
Anthropic releases Claude Fable 5.2
Mythos 5.2 for vetted security and science teams
Written with AI assistance, reviewed by the ACN desk.
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ACN Weekly Recap: Week of November 9, 2026
- Anthropic releases Claude Fable 5.2
The quick hit
- Anthropic has released Claude Fable 5.2 and Claude Mythos 5.2 on Monday.
- Fable 5.2 costs $8 per million input tokens and $40 per million output tokens.
- Mythos 5.2 goes to vetted security and life-science teams through verification programs.
Anthropic has released Claude Fable 5.2 and Claude Mythos 5.2. The company announced both models on Monday, November 9.
Anthropic says they are one model under two names. Its post states: “Claude Fable and Claude Mythos are the same underlying model.”
Fable 5.2 is for everyone. It is available on all of Anthropic’s platforms, including the Amazon, Google and Microsoft clouds.
Mythos 5.2 is narrower. It is for vetted security and life-science teams. They apply through verification programs.
The price is $8 per million tokens of input and $40 per million tokens of output. Anthropic calls that a lower price.
Anthropic also reports a benchmark result. It says Fable 5.2, at its highest effort setting, scored highest of any released model it tested on FrontierCode, a coding benchmark. The result is the company’s own.
“Claude Fable and Claude Mythos are the same underlying model.”
Sources
- Anthropic · Nov 9, 2026
