# Claude Sonnet 5.5 vs Mistral Medium 3.5

As of Oct 15, 2026, Claude Sonnet 5.5 leads Mistral Medium 3.5 in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

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

Claude Sonnet 5.5: closed weights.

Mistral Medium 3.5: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Sonnet 5.5 leads Mistral Medium 3.5 in General LLM at #29 against #106.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads Mistral Medium 3.5 in Reasoning at #18 against #112.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Mistral Medium 3.5 in Coding › Web dev at #3 against #110.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads Mistral Medium 3.5 in Long context at #11 against #119.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads Mistral Medium 3.5 in Factuality at #17 against #106.

As of Oct 15, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; methodology v1.0).

As of Oct 15, 2026, Mistral Medium 3.5 is ranked #106 in General LLM (since Oct 15, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).