Claude Opus 5.5 vs GPT-4O Mini
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-4O Mini in 2 of 2 shared categories: General LLM and Science.
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.
GPT-4O Mini
#9 Best recorded rank: #9 in General LLM, as of Oct 14, 2026.
| Category | Claude Opus 5.5 | GPT-4O Mini |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #9 · #9 in General LLM Margin — LMArena leaderboard dataset · Sep 15, 2024 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jul 18, 2024 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | — |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #161 · #161 in Science Margin — Epoch AI benchmarking hub · Jul 18, 2024 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Sep 27, 2024 |
| 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 | — |
| 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 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jul 18, 2024 |
| 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.
GPT-4O Mini: $0.26249999999999996 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-4O Mini: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-4O Mini in General LLM at #2 against #9.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-4O Mini in Science at #31 against #161.
Claude Opus 5.5 or GPT-4O Mini?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-4O Mini in 2 of 2 shared categories: General LLM and Science.
Claude Opus 5.5 or GPT-4O Mini for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-4O Mini in General LLM at #2 against #9.
Claude Opus 5.5 or GPT-4O Mini for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-4O Mini in Science at #31 against #161.