# Claude Opus 5 vs DeepSeek V4 Flash 0731

As of Oct 15, 2026, Claude Opus 5 leads DeepSeek V4 Flash 0731 in 2 of 2 shared categories: Science and Abstraction (ARC).

Claude Opus 5: $10 per 1M blended tokens.

DeepSeek V4 Flash 0731: $0.17200000000000001 per 1M blended tokens.

Claude Opus 5: closed weights.

DeepSeek V4 Flash 0731: closed weights.

- Which to pick, Science: As of Oct 15, 2026, Claude Opus 5 leads DeepSeek V4 Flash 0731 in Science at #12 against #27.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5 leads DeepSeek V4 Flash 0731 in Abstraction (ARC) at #3 against #18.

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, DeepSeek V4 Flash 0731 is ranked #18 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; methodology v1.0).