When was Claude Fable 5.2 released?

Anthropic announced it and made it available on 9 November 2026.

How much does Claude Fable 5.2 cost?

$8 per million input tokens and $40 per million output tokens, down from $10 and $50 for Claude Fable 5.1, according to Anthropic's pricing page.

What is the difference between Claude Fable 5.2 and Claude Mythos 5.2?

Anthropic says they are the same underlying model. Fable 5.2 carries cybersecurity and biology safeguards and is open to all users; Mythos 5.2 is available only to vetted organizations in those fields.

Claude Fable 5.2 news

Large language model1 story

Claude Fable 5.2 is Anthropic's most capable generally available large language model, released on 9 November 2026 together with Claude Mythos 5.2, the same underlying model with fewer cyber and biology safeguards for vetted organizations.

Image Anthropic published with the announcement covered in this story — Claude Fable 5.2 and Mythos 5.2 launch at $8 per 1M input tokens, 20% below Fable 5.1

AI Models10 Nov 2026, 07:30 UTC

Anthropic released Claude Fable 5.2 and Mythos 5.2 on 9 November 2026 at $8 input and $40 output per 1M tokens, with up to 30% faster output and a fast mode.

Summary

Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on 9 November 2026. They are one model: Fable is open to all users with cyber and biology safeguards, Mythos goes to vetted organizations. The price falls to $8 per million input tokens and $40 per million output tokens from $10 and $50 for Fable 5.1, output is up to 30% faster, and Anthropic reports the top FrontierCode 2.0 score of any released model it tested.

About Claude Fable 5.2

Reviewed 10 Nov 2026 · by Anthropic

Facts at a glance

Developer: Anthropic
Released: 9 November 2026 source
API name: claude-fable-5-2 source
Context window: 1,000,000 tokens source
Max output: 128,000 tokens source
Knowledge cutoff: June 2026 (reliable knowledge and training data) source
API price: $8 per 1M input tokens, $40 per 1M output tokens, $0.20 cache reads source
Fast mode price: $16 per 1M input tokens, $80 per 1M output tokens, up to 2.5 times faster output source
Retirement: Not sooner than 9 November 2027 source

More about Claude Fable 5.2 (show)

What Claude Fable 5.2 is used for

Anthropic positions Fable 5.2 above Claude Opus 5.5 for the most ambitious, open-ended technical work such as large software migrations, long unattended audits, hardware design and scientific research, and recommends Opus 5.5 as the starting point for most everyday coding and knowledge tasks. Fable 5.2 can also act as an advisor that smaller Claude models consult, or as an orchestrator that hands simpler tasks to them. Its classifiers block most cybersecurity and research biology tasks; vetted organizations can apply for Claude Mythos 5.2, the same model without those blocks, through Anthropic's Cyber and Life Sciences Verification Programs.

Questions people ask

When was Claude Fable 5.2 released?: Anthropic announced it and made it available on 9 November 2026.
How much does Claude Fable 5.2 cost?: $8 per million input tokens and $40 per million output tokens, down from $10 and $50 for Claude Fable 5.1, according to Anthropic's pricing page.
What is the difference between Claude Fable 5.2 and Claude Mythos 5.2?: Anthropic says they are the same underlying model. Fable 5.2 carries cybersecurity and biology safeguards and is open to all users; Mythos 5.2 is available only to vetted organizations in those fields.

Claude Fable 5.2 news

Every story about Claude Fable 5.2

Claude Fable 5.2 and Mythos 5.2 launch at $8 per 1M input tokens, 20% below Fable 5.1