Claude Sonnet 5.5 vs GPT-5 Mini
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in 6 of 6 shared categories: General LLM, Reasoning, Math, Science, Long context, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
GPT-5 Mini
It used to be. Was SOTA in Math.
| Category | Claude Sonnet 5.5 | GPT-5 Mini |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #128 · #128 in General LLM Margin 87.07482993197279 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #130 · #130 in Reasoning Margin 89.72602739726028 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #21 · Was SOTA · Math Margin 44.44444444444444 Epoch AI benchmarking hub · Aug 7, 2025 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #81 · #81 in Science Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #3 · Near-SOTA · Coding › Web dev Margin 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #146 · #146 in Long context Margin 99.31972789115646 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | #110 · #110 in Factuality Margin 82.83582089552239 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #41 · #41 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GPT-5 Mini: $0.6875 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GPT-5 Mini: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in General LLM at #27 against #128.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in Reasoning at #18 against #130.
Math: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in Math at #4 against #21.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in Science at #3 against #81.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in Long context at #11 against #146.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in Factuality at #16 against #110.
Claude Sonnet 5.5 · GPT-5 Mini
Claude Sonnet 5.5 or GPT-5 Mini?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in 6 of 6 shared categories: General LLM, Reasoning, Math, Science, Long context, and Factuality.
Claude Sonnet 5.5 or GPT-5 Mini for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in General LLM at #27 against #128.
Claude Sonnet 5.5 or GPT-5 Mini for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in Reasoning at #18 against #130.
Claude Sonnet 5.5 or GPT-5 Mini for Math?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5 Mini in Math at #4 against #21.