Claude Sonnet 5.5 vs Gemini 2.5 Pro
As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in Coding (tied), Coding › Agentic (tied), and Vision (tied).
Gemini 2.5 Pro
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 15.425531914893611 LMArena leaderboard dataset · Oct 13, 2026 | #78 · Was SOTA · General LLM Margin 41.48936170212766 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 10.106382978723403 LMArena leaderboard dataset · Oct 13, 2026 | #92 · Was SOTA · Reasoning Margin 49.46808510638298 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 | #58 · #58 in Science Margin — Epoch AI benchmarking hub · Jun 17, 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 1.5999999999999943 LMArena leaderboard dataset · Oct 13, 2026 | #119 · #119 in Coding › Web dev Margin 94.4 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #72 · Was SOTA · Long context Margin 38.297872340425535 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 | #17 · #17 in Factuality Margin 10.465116279069761 LMArena leaderboard dataset · Oct 13, 2026 | #37 · #37 in Factuality Margin 22.093023255813947 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #48 · #48 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 17, 2025 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
Gemini 2.5 Pro: $3.4375000000000004 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
Gemini 2.5 Pro: closed weights.
General LLM: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in General LLM at #29 against #78.
Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in Reasoning at #18 against #92.
Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in Science at #3 against #58.
Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in Coding › Web dev at #3 against #119.
Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in Long context at #11 against #72.
Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in Factuality at #17 against #37.
Claude Sonnet 5.5 · Gemini 2.5 Pro
Claude Sonnet 5.5 or Gemini 2.5 Pro?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5 or Gemini 2.5 Pro for General LLM?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in General LLM at #29 against #78.
Claude Sonnet 5.5 or Gemini 2.5 Pro for Reasoning?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in Reasoning at #18 against #92.
Claude Sonnet 5.5 or Gemini 2.5 Pro for Science?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.5 Pro in Science at #3 against #58.