Claude Opus 4.5 vs Gemini 3.8 Flash
As of Oct 14, 2026, Claude Opus 4.5 leads Gemini 3.8 Flash in 0 of 8 shared categories.
Claude Opus 4.5
It used to be. Was SOTA in Reasoning.
Gemini 3.8 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 4.5 | Gemini 3.8 Flash |
|---|---|---|
| General LLM | #33 · #33 in General LLM Margin 22.448979591836732 LMArena leaderboard dataset · Oct 13, 2026 | #7 · Was SOTA · General LLM Margin 4.761904761904759 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #28 · Was SOTA · Reasoning Margin 19.86301369863014 LMArena leaderboard dataset · Oct 13, 2026 | #6 · #6 in Reasoning Margin 4.794520547945211 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #16 · #16 in Math Margin 33.33333333333333 Epoch AI benchmarking hub · Nov 24, 2025 | #5 · #5 in Math Margin 8.888888888888886 Epoch AI benchmarking hub · Sep 2, 2026 |
| Science | #68 · #68 in Science Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #4 · #4 in Science Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #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 | #53 · Was SOTA · Coding › Web dev Margin 48.598130841121495 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Coding › Web dev Margin 24.29906542056075 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #19 · Was SOTA · Long context Margin 12.925170068027214 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Near-SOTA · Long context Margin 3.401360544217681 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #15 · #15 in Vision Margin 42.10526315789474 Epoch AI benchmarking hub · Sep 2, 2026 |
| Factuality | #36 · #36 in Factuality Margin 27.611940298507463 LMArena leaderboard dataset · Oct 13, 2026 | #17 · #17 in Factuality Margin 13.43283582089552 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #49 · #49 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
Claude Opus 4.5: $10 per 1M blended tokens.
Gemini 3.8 Flash: $1.5 per 1M blended tokens.
Claude Opus 4.5: closed weights.
Gemini 3.8 Flash: closed weights.
General LLM: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in General LLM at #7 against #33.
Reasoning: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Reasoning at #6 against #28.
Math: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Math at #5 against #16.
Science: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Science at #4 against #68.
Coding › Web dev: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Coding › Web dev at #27 against #53.
Long context: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Long context at #5 against #19.
Factuality: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Factuality at #17 against #36.
Abstraction (ARC): As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Abstraction (ARC) at #1 against #49.
Claude Opus 4.5 · Gemini 3.8 Flash
Claude Opus 4.5 or Gemini 3.8 Flash?
As of Oct 14, 2026, Claude Opus 4.5 leads Gemini 3.8 Flash in 0 of 8 shared categories.
Claude Opus 4.5 or Gemini 3.8 Flash for General LLM?
As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in General LLM at #7 against #33.
Claude Opus 4.5 or Gemini 3.8 Flash for Reasoning?
As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Reasoning at #6 against #28.
Claude Opus 4.5 or Gemini 3.8 Flash for Math?
As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Opus 4.5 in Math at #5 against #16.