Claude Sonnet 5 vs O3 Mini
As of Oct 15, 2026, Claude Sonnet 5 leads O3 Mini in 3 of 4 shared categories: Reasoning, Science, and Long context.
Claude Sonnet 5
#19 Best current rank: #19 in Coding, as of Oct 15, 2026.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Claude Sonnet 5 | O3 Mini |
|---|---|---|
| General LLM | #50 · #50 in General LLM Margin 26.59574468085107 LMArena leaderboard dataset · Oct 13, 2026 | #10 · #10 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #40 · #40 in Reasoning Margin 21.808510638297875 LMArena leaderboard dataset · Oct 13, 2026 | #172 · Was SOTA · Reasoning Margin 92.02127659574468 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 | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Jun 30, 2026 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #19 · #19 in Coding Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #19 · #19 in Coding › Agentic Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #40 · #40 in Coding › Web dev Margin 31.200000000000003 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #36 · #36 in Long context Margin 19.148936170212764 LMArena leaderboard dataset · Oct 13, 2026 | #186 · #186 in Long context Margin 98.93617021276596 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #56 · #56 in Factuality Margin 33.13953488372093 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | — | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Claude Sonnet 5: $4.000000000000001 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Sonnet 5: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 15, 2026, O3 Mini leads Claude Sonnet 5 in General LLM at #10 against #50.
Reasoning: As of Oct 15, 2026, Claude Sonnet 5 leads O3 Mini in Reasoning at #40 against #172.
Science: As of Oct 15, 2026, Claude Sonnet 5 leads O3 Mini in Science at #32 against #76.
Long context: As of Oct 15, 2026, Claude Sonnet 5 leads O3 Mini in Long context at #36 against #186.
Claude Sonnet 5 or O3 Mini?
As of Oct 15, 2026, Claude Sonnet 5 leads O3 Mini in 3 of 4 shared categories: Reasoning, Science, and Long context.
Claude Sonnet 5 or O3 Mini for General LLM?
As of Oct 15, 2026, O3 Mini leads Claude Sonnet 5 in General LLM at #10 against #50.
Claude Sonnet 5 or O3 Mini for Reasoning?
As of Oct 15, 2026, Claude Sonnet 5 leads O3 Mini in Reasoning at #40 against #172.
Claude Sonnet 5 or O3 Mini for Science?
As of Oct 15, 2026, Claude Sonnet 5 leads O3 Mini in Science at #32 against #76.