Claude Sonnet 5.5 vs O1 Preview
As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in 4 of 4 shared categories: General LLM, Reasoning, Science, and Long context.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
O1 Preview
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 5.5 | O1 Preview |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #129 · Was SOTA · General LLM Margin 87.75510204081633 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #137 · Was SOTA · Reasoning Margin 94.52054794520548 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #125 · #125 in Science Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
| 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 | #135 · Was SOTA · Long context Margin 91.83673469387755 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | — |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | — | #73 · #73 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
O1 Preview: price per 1M tokens is unset in the catalog.
Claude Sonnet 5.5: closed weights.
O1 Preview: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in General LLM at #27 against #129.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in Reasoning at #18 against #137.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in Science at #3 against #125.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in Long context at #11 against #135.
Claude Sonnet 5.5 · O1 Preview
Claude Sonnet 5.5 or O1 Preview?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in 4 of 4 shared categories: General LLM, Reasoning, Science, and Long context.
Claude Sonnet 5.5 or O1 Preview for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in General LLM at #27 against #129.
Claude Sonnet 5.5 or O1 Preview for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in Reasoning at #18 against #137.
Claude Sonnet 5.5 or O1 Preview for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads O1 Preview in Science at #3 against #125.