Claude Opus 5.5 vs Mistral Medium 2505
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in 4 of 4 shared categories: General LLM, Reasoning, Science, and Long context.
Claude Opus 5.5
Yes. SOTA in Reasoning (tied), Coding (tied), Coding › Agentic (tied), Coding › Web dev, Long context (tied), and Factuality (tied).
Mistral Medium 2505
#41 Best current rank: #41 in Math, as of Oct 15, 2026.
| Category | Claude Opus 5.5 | Mistral Medium 2505 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.0638297872340416 LMArena leaderboard dataset · Oct 13, 2026 | #169 · #169 in General LLM Margin 89.8936170212766 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #173 · #173 in Reasoning Margin 92.55319148936171 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #41 · #41 in Math Margin 91.11111111111111 Epoch AI benchmarking hub · May 7, 2025 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #110 · #110 in Science Margin — Epoch AI benchmarking hub · May 7, 2025 |
| 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 | — |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #166 · #166 in Long context Margin 88.29787234042553 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 | — |
| 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 2505: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: closed weights.
Mistral Medium 2505: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in General LLM at #2 against #169.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in Reasoning at #1 against #173.
Science: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in Science at #31 against #110.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in Long context at #1 against #166.
Claude Opus 5.5 · Mistral Medium 2505
Claude Opus 5.5 or Mistral Medium 2505?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in 4 of 4 shared categories: General LLM, Reasoning, Science, and Long context.
Claude Opus 5.5 or Mistral Medium 2505 for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in General LLM at #2 against #169.
Claude Opus 5.5 or Mistral Medium 2505 for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in Reasoning at #1 against #173.
Claude Opus 5.5 or Mistral Medium 2505 for Science?
As of Oct 15, 2026, Claude Opus 5.5 leads Mistral Medium 2505 in Science at #31 against #110.