Claude Opus 4.6 vs Gemini 3.5 Flash
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
Gemini 3.5 Flash
#12 Best recorded rank: #12 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Opus 4.6 | Gemini 3.5 Flash |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in General LLM Margin 16.326530612244895 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #32 · #32 in Reasoning Margin 22.602739726027394 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #18 · #18 in Science Margin — Epoch AI benchmarking hub · May 19, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · May 19, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | #48 · #48 in Coding › Web dev Margin 43.925233644859816 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #28 · #28 in Long context Margin 19.04761904761905 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · May 19, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in Factuality Margin 10.447761194029852 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 19, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
Gemini 3.5 Flash: $3.375 per 1M blended tokens.
Claude Opus 4.6: closed weights.
Gemini 3.5 Flash: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in General LLM at #4 against #24.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in Reasoning at #2 against #32.
Science: As of Oct 14, 2026, Gemini 3.5 Flash leads Claude Opus 4.6 in Science at #18 against #32.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in Coding › Web dev at #35 against #48.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in Long context at #2 against #28.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in Factuality at #3 against #13.
Claude Opus 4.6 · Gemini 3.5 Flash
Claude Opus 4.6 or Gemini 3.5 Flash?
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6 or Gemini 3.5 Flash for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in General LLM at #4 against #24.
Claude Opus 4.6 or Gemini 3.5 Flash for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 3.5 Flash in Reasoning at #2 against #32.
Claude Opus 4.6 or Gemini 3.5 Flash for Science?
As of Oct 14, 2026, Gemini 3.5 Flash leads Claude Opus 4.6 in Science at #18 against #32.