Claude Sonnet 5.5 vs O4 Mini
As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in 5 of 5 shared categories: General LLM, Reasoning, Math, Science, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
O4 Mini
It used to be. Was SOTA in Math.
| Category | Claude Sonnet 5.5 | O4 Mini |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #125 · #125 in General LLM Margin 85.03401360544217 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #129 · #129 in Reasoning Margin 89.04109589041096 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #23 · Was SOTA · Math Margin 48.888888888888886 Epoch AI benchmarking hub · Apr 16, 2025 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #70 · #70 in Science Margin — Epoch AI benchmarking hub · Apr 16, 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 | #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 | #— · Not enough data Margin — LMArena leaderboard dataset · Jul 7, 2025 |
| 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 | #122 · #122 in Factuality Margin 91.7910447761194 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #39 · #39 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
O4 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
O4 Mini: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in General LLM at #27 against #125.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in Reasoning at #18 against #129.
Math: As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in Math at #4 against #23.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in Science at #3 against #70.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in Factuality at #16 against #122.
Claude Sonnet 5.5 or O4 Mini?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in 5 of 5 shared categories: General LLM, Reasoning, Math, Science, and Factuality.
Claude Sonnet 5.5 or O4 Mini for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in General LLM at #27 against #125.
Claude Sonnet 5.5 or O4 Mini for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in Reasoning at #18 against #129.
Claude Sonnet 5.5 or O4 Mini for Math?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O4 Mini in Math at #4 against #23.