# Claude Fable 5.1 vs Kimi K2 5

As of Oct 15, 2026, Claude Fable 5.1 leads Kimi K2 5 in 2 of 2 shared categories: Math and Abstraction (ARC).

Claude Fable 5.1: $20 per 1M blended tokens.

Kimi K2 5: $1.0000000000000002 per 1M blended tokens.

Claude Fable 5.1: closed weights.

Kimi K2 5: open weights.

- Which to pick, Math: As of Oct 15, 2026, Claude Fable 5.1 leads Kimi K2 5 in Math at #2 against #17.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5.1 leads Kimi K2 5 in Abstraction (ARC) at #3 against #35.

As of Oct 15, 2026, Claude Fable 5.1 is tied for state of the art in Factuality (since Oct 2, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Kimi K2 5 is ranked #17 in Math (since Oct 15, 2026; sources Humanity's Last Exam; methodology v1.0).