Anthropic adds fast mode for Claude Fable 5.2

Fast mode for Claude Fable 5.2 is available in Messages API requests, delivering up to 2.5 times higher output tokens per second. It costs $16 per million input tokens and $80 per million output tokens.

Context

1M

Max output

128K

Input price

$8.00

Knowledge cutoff

Jun 2026

Claude Developer Platform release notes ↗

Source: Claude Developer Platform release notes, checked Nov 9, 2026. Summarized from the provider’s announcement.