Claude Fable 5

Anthropic's most capable generally available model, the top of the Claude 5 family.

API model ID	`claude-fable-5`
Context window	1M tokens
Max output	128K tokens
Input price	$10 per million tokens
Output price	$50 per million tokens
Knowledge cutoff	Jan 2026
Released	Jun 9, 2026
Tokenizer generation	New (Opus 4.7+)
Status	Active

From the announcement

The Mythos-class debut, a tier above Opus.
Fable 5 is the Mythos-class model made safe for general availability.
Briefly paused under a US government order, redeployed from Jul 1, 2026.
Mythos 5 runs with the US government under Project Glasswing.

Read Anthropic's announcement

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Other models

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