Claude Opus 5.5 vs Mistral Medium 3.5
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
Mistral Medium 3.5
#106 Best current rank: #106 in General LLM, as of Oct 15, 2026.
| Category | Claude Opus 5.5 | Mistral Medium 3.5 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.0638297872340416 LMArena leaderboard dataset · Oct 13, 2026 | #106 · #106 in General LLM Margin 56.38297872340426 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #112 · #112 in Reasoning Margin 60.1063829787234 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #110 · #110 in Coding › Web dev Margin 87.2 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #119 · #119 in Long context Margin 63.297872340425535 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #106 · #106 in Factuality Margin 62.2093023255814 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Mistral Medium 3.5: $3 per 1M blended tokens.
Claude Opus 5.5: closed weights.
Mistral Medium 3.5: open weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in General LLM at #2 against #106.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in Reasoning at #1 against #112.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in Coding › Web dev at #1 against #110.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in Long context at #1 against #119.
Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in Factuality at #1 against #106.
Claude Opus 5.5 · Mistral Medium 3.5
Claude Opus 5.5 or Mistral Medium 3.5?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5 or Mistral Medium 3.5 for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in General LLM at #2 against #106.
Claude Opus 5.5 or Mistral Medium 3.5 for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in Reasoning at #1 against #112.
Claude Opus 5.5 or Mistral Medium 3.5 for Coding › Web dev?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 3.5 in Coding › Web dev at #1 against #110.