Gemini 3.8 Flash vs GPT-5.5
As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in 6 of 8 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Abstraction (ARC).
Gemini 3.8 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
GPT-5.5
Close. Near-SOTA in Factuality, rank #5.
| Category | Gemini 3.8 Flash | GPT-5.5 |
|---|---|---|
| General LLM | #7 · Near-SOTA · General LLM Margin 3.723404255319153 LMArena leaderboard dataset · Oct 13, 2026 | #22 · Was SOTA · General LLM Margin 11.702127659574472 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #6 · Near-SOTA · Reasoning Margin 3.723404255319153 LMArena leaderboard dataset · Oct 13, 2026 | #26 · #26 in Reasoning Margin 14.36170212765957 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #5 · #5 in Math Margin 8.888888888888886 Epoch AI benchmarking hub · Sep 2, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #4 · #4 in Science Margin — Epoch AI benchmarking hub · Sep 2, 2026 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
| Coding | #15 · #15 in Coding Margin 72.72727272727272 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #15 · #15 in Coding › Agentic Margin 72.72727272727272 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #29 · #29 in Coding › Web dev Margin 22.400000000000006 LMArena leaderboard dataset · Oct 13, 2026 | #48 · #48 in Coding › Web dev Margin 37.6 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #5 · Near-SOTA · Long context Margin 2.659574468085111 LMArena leaderboard dataset · Oct 13, 2026 | #26 · Was SOTA · Long context Margin 13.829787234042556 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #15 · #15 in Vision Margin 42.10526315789474 Epoch AI benchmarking hub · Sep 2, 2026 | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 |
| Factuality | #19 · #19 in Factuality Margin 11.6279069767442 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Near-SOTA · Factuality Margin 3.4883720930232442 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 2, 2026 | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
Gemini 3.8 Flash: $1.5 per 1M blended tokens.
GPT-5.5: $11.25 per 1M blended tokens.
Gemini 3.8 Flash: closed weights.
GPT-5.5: closed weights.
General LLM: As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in General LLM at #7 against #22.
Reasoning: As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in Reasoning at #6 against #26.
Science: As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in Science at #4 against #30.
Coding › Web dev: As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in Coding › Web dev at #29 against #48.
Long context: As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in Long context at #5 against #26.
Vision: As of Oct 15, 2026, GPT-5.5 leads Gemini 3.8 Flash in Vision at #10 against #15.
Factuality: As of Oct 15, 2026, GPT-5.5 leads Gemini 3.8 Flash in Factuality at #5 against #19.
Abstraction (ARC): As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in Abstraction (ARC) at #1 against #7.
Gemini 3.8 Flash or GPT-5.5?
As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in 6 of 8 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Abstraction (ARC).
Gemini 3.8 Flash or GPT-5.5 for General LLM?
As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in General LLM at #7 against #22.
Gemini 3.8 Flash or GPT-5.5 for Reasoning?
As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in Reasoning at #6 against #26.
Gemini 3.8 Flash or GPT-5.5 for Science?
As of Oct 15, 2026, Gemini 3.8 Flash leads GPT-5.5 in Science at #4 against #30.