Anthropic shipped Claude Fable 5.2 and Claude Mythos 5.2 today, the second big update since Fable 5 arrived in June. Fable is Claude’s top tier, above Opus, Sonnet and Haiku.
- Better coding, reasoning and vision, and clearer communication, per Anthropic.
- Up to 30% faster output than the 5.1 versions.
- Cheaper: $8 per million input tokens and $40 per million output tokens.
- Anthropic still says to start with Opus 5.5 as the daily driver and move up to Fable or Mythos only for big, open-ended work.
- Anthropic says over 90% of the changes merged into its core codebase are now written by Claude, and that agents on an early 5.2 moved a production service from Python to Rust.
My take
Faster and cheaper at the top tier is nice, but those are still premium prices. I’ll follow Anthropic’s own advice: Opus for daily work, Fable when a job really needs it, and spend caps on every key.
God Bless, and May the Source Be with You!
