# Claude Opus 5 vs Mistral Medium 3.5

As of Oct 14, 2026, Claude Opus 5 leads Mistral Medium 3.5 in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

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

Mistral Medium 3.5: $3 per 1M blended tokens.

Claude Opus 5: closed weights.

Mistral Medium 3.5: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Opus 5 leads Mistral Medium 3.5 in General LLM at #11 against #82.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Opus 5 leads Mistral Medium 3.5 in Reasoning at #9 against #86.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads Mistral Medium 3.5 in Coding › Web dev at #6 against #99.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 5 leads Mistral Medium 3.5 in Long context at #9 against #93.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Opus 5 leads Mistral Medium 3.5 in Factuality at #4 against #84.

As of Oct 14, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 14, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 14, 2026, Mistral Medium 3.5 is ranked #82 in General LLM (since Oct 14, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).