Claude Sonnet 4.5 vs Gemini 3.8 Flash
As of Oct 14, 2026, Claude Sonnet 4.5 leads Gemini 3.8 Flash in 0 of 8 shared categories.
Claude Sonnet 4.5
It used to be. Was SOTA in General LLM.
Gemini 3.8 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Sonnet 4.5 | Gemini 3.8 Flash |
|---|---|---|
| General LLM | #49 · Was SOTA · General LLM Margin 33.33333333333333 LMArena leaderboard dataset · Oct 13, 2026 | #7 · Was SOTA · General LLM Margin 4.761904761904759 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #40 · Was SOTA · Reasoning Margin 28.082191780821915 LMArena leaderboard dataset · Oct 13, 2026 | #6 · #6 in Reasoning Margin 4.794520547945211 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #25 · #25 in Math Margin 53.333333333333336 Epoch AI benchmarking hub · Sep 29, 2025 | #5 · #5 in Math Margin 8.888888888888886 Epoch AI benchmarking hub · Sep 2, 2026 |
| Science | #82 · #82 in Science Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #4 · #4 in Science Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Sep 29, 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 | #78 · Was SOTA · Coding › Web dev Margin 71.96261682242991 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Coding › Web dev Margin 24.29906542056075 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #29 · Was SOTA · Long context Margin 19.72789115646259 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 | #50 · #50 in Factuality Margin 38.059701492537314 LMArena leaderboard dataset · Oct 13, 2026 | #17 · #17 in Factuality Margin 13.43283582089552 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #66 · #66 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
Claude Sonnet 4.5: $6 per 1M blended tokens.
Gemini 3.8 Flash: $1.5 per 1M blended tokens.
Claude Sonnet 4.5: closed weights.
Gemini 3.8 Flash: closed weights.
General LLM: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in General LLM at #7 against #49.
Reasoning: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Reasoning at #6 against #40.
Math: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Math at #5 against #25.
Science: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Science at #4 against #82.
Coding › Web dev: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Coding › Web dev at #27 against #78.
Long context: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Long context at #5 against #29.
Factuality: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Factuality at #17 against #50.
Abstraction (ARC): As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Abstraction (ARC) at #1 against #66.
Claude Sonnet 4.5 · Gemini 3.8 Flash
Claude Sonnet 4.5 or Gemini 3.8 Flash?
As of Oct 14, 2026, Claude Sonnet 4.5 leads Gemini 3.8 Flash in 0 of 8 shared categories.
Claude Sonnet 4.5 or Gemini 3.8 Flash for General LLM?
As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in General LLM at #7 against #49.
Claude Sonnet 4.5 or Gemini 3.8 Flash for Reasoning?
As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Reasoning at #6 against #40.
Claude Sonnet 4.5 or Gemini 3.8 Flash for Math?
As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Sonnet 4.5 in Math at #5 against #25.