Claude Sonnet 5.5 vs GPT-6.1 Sol
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in 6 of 9 shared categories: Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in Coding (tied), Coding › Agentic (tied), and Vision (tied).
GPT-6.1 Sol
Yes. SOTA in Vision (tied).
| Category | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 15.425531914893611 LMArena leaderboard dataset · Oct 13, 2026 | #18 · #18 in General LLM Margin 9.574468085106389 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 10.106382978723403 LMArena leaderboard dataset · Oct 13, 2026 | #15 · #15 in Reasoning Margin 8.510638297872347 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 | #4 · #4 in Science Margin — Epoch AI benchmarking hub · Sep 29, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #2 · Near-SOTA · Coding Margin 13.63636363636364 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #2 · Near-SOTA · Coding › Agentic Margin 13.63636363636364 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #3 · Near-SOTA · Coding › Web dev Margin 1.5999999999999943 LMArena leaderboard dataset · Oct 13, 2026 | #4 · Near-SOTA · Coding › Web dev Margin 2.4000000000000057 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #18 · #18 in Long context Margin 9.574468085106389 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 29, 2026 |
| Factuality | #17 · #17 in Factuality Margin 10.465116279069761 LMArena leaderboard dataset · Oct 13, 2026 | #33 · #33 in Factuality Margin 19.767441860465127 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 29, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GPT-6.1 Sol: $4.000000000000001 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GPT-6.1 Sol: closed weights.
General LLM: As of Oct 15, 2026, GPT-6.1 Sol leads Claude Sonnet 5.5 in General LLM at #18 against #29.
Reasoning: As of Oct 15, 2026, GPT-6.1 Sol leads Claude Sonnet 5.5 in Reasoning at #15 against #18.
Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Science at #3 against #4.
Coding: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Coding at #1 against #2.
Coding › Agentic: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Coding › Agentic at #1 against #2.
Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Coding › Web dev at #3 against #4.
Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Long context at #11 against #18.
Vision: As of Oct 15, 2026, Claude Sonnet 5.5 and GPT-6.1 Sol share #1 in Vision.
Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Factuality at #17 against #33.
Claude Sonnet 5.5 · GPT-6.1 Sol
Claude Sonnet 5.5 or GPT-6.1 Sol?
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in 6 of 9 shared categories: Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5 or GPT-6.1 Sol for General LLM?
As of Oct 15, 2026, GPT-6.1 Sol leads Claude Sonnet 5.5 in General LLM at #18 against #29.
Claude Sonnet 5.5 or GPT-6.1 Sol for Reasoning?
As of Oct 15, 2026, GPT-6.1 Sol leads Claude Sonnet 5.5 in Reasoning at #15 against #18.
Claude Sonnet 5.5 or GPT-6.1 Sol for Science?
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Science at #3 against #4.