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Claude Fable 5.2

Updated Nov 12, 2026. Checked daily. Last checked Nov 13, 2026.

Anthropic

Claude app, Pro plan ($20/month) or higher, choose Claude Fable 5.2.

Paid plan

Cost
Pro is $20/month, or $17 if billed yearly. API is $8 per million input tokens and $40 per million output.
Free tier
Not on the free plan. Fable requires a paid plan or API access.
Privacy default
Anthropic says Free, Pro, and Max chats are used for training only if you allow it, and you choose at signup. The toggle has been reported as on by default, so check it. Settings, then Privacy. Turn off Help improve Claude. Source

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Leader history

Questions

Is Claude Fable 5.2 good for reasoning, math & science?

Claude Fable 5.2 is the leader pick for reasoning, math & science. Leads the hardest expert-level exams across advanced mathematics, physics, and multidisciplinary scientific reasoning.

How much does Claude Fable 5.2 cost?

Pro is $20/month, or $17 if billed yearly. API is $8 per million input tokens and $40 per million output.

Does Claude Fable 5.2 train on my chats?

Anthropic says Free, Pro, and Max chats are used for training only if you allow it, and you choose at signup. The toggle has been reported as on by default, so check it. Settings, then Privacy. Turn off Help improve Claude.