Claude Opus 4.6 vs Gemini 3.8 Flash
As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in 4 of 7 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
Gemini 3.8 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 4.6 | Gemini 3.8 Flash |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.1276595744680833 LMArena leaderboard dataset · Oct 13, 2026 | #7 · Near-SOTA · General LLM Margin 3.723404255319153 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Near-SOTA · Reasoning Margin 3.723404255319153 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #5 · #5 in Math Margin 8.888888888888886 Epoch AI benchmarking hub · Sep 2, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #4 · #4 in Science Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #15 · #15 in Coding Margin 72.72727272727272 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #15 · #15 in Coding › Agentic Margin 72.72727272727272 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #37 · Was SOTA · Coding › Web dev Margin 28.799999999999997 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in Coding › Web dev Margin 22.400000000000006 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.5319148936170421 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Near-SOTA · Long context Margin 2.659574468085111 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #15 · #15 in Vision Margin 42.10526315789474 Epoch AI benchmarking hub · Sep 2, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.3255813953488342 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Factuality Margin 11.6279069767442 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
Gemini 3.8 Flash: $1.5 per 1M blended tokens.
Claude Opus 4.6: closed weights.
Gemini 3.8 Flash: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in General LLM at #4 against #7.
Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in Reasoning at #2 against #6.
Math: As of Oct 15, 2026, Gemini 3.8 Flash leads Claude Opus 4.6 in Math at #5 against #11.
Science: As of Oct 15, 2026, Gemini 3.8 Flash leads Claude Opus 4.6 in Science at #4 against #32.
Coding › Web dev: As of Oct 15, 2026, Gemini 3.8 Flash leads Claude Opus 4.6 in Coding › Web dev at #29 against #37.
Long context: As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in Long context at #2 against #5.
Factuality: As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in Factuality at #3 against #19.
Claude Opus 4.6 · Gemini 3.8 Flash
Claude Opus 4.6 or Gemini 3.8 Flash?
As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in 4 of 7 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6 or Gemini 3.8 Flash for General LLM?
As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in General LLM at #4 against #7.
Claude Opus 4.6 or Gemini 3.8 Flash for Reasoning?
As of Oct 15, 2026, Claude Opus 4.6 leads Gemini 3.8 Flash in Reasoning at #2 against #6.
Claude Opus 4.6 or Gemini 3.8 Flash for Math?
As of Oct 15, 2026, Gemini 3.8 Flash leads Claude Opus 4.6 in Math at #5 against #11.