Gemini 2.5 Pro vs Gemini 3.8 Flash
As of Oct 15, 2026, Gemini 2.5 Pro leads Gemini 3.8 Flash in 0 of 7 shared categories.
Gemini 2.5 Pro
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 | Gemini 2.5 Pro | Gemini 3.8 Flash |
|---|---|---|
| General LLM | #78 · Was SOTA · General LLM Margin 41.48936170212766 LMArena leaderboard dataset · Oct 13, 2026 | #7 · Near-SOTA · General LLM Margin 3.723404255319153 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #92 · Was SOTA · Reasoning Margin 49.46808510638298 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Near-SOTA · Reasoning Margin 3.723404255319153 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #5 · #5 in Math Margin 8.888888888888886 Epoch AI benchmarking hub · Sep 2, 2026 |
| Science | #58 · #58 in Science Margin — Epoch AI benchmarking hub · Jun 17, 2025 | #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 | #119 · #119 in Coding › Web dev Margin 94.4 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in Coding › Web dev Margin 22.400000000000006 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #72 · Was SOTA · Long context Margin 38.297872340425535 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 | #37 · #37 in Factuality Margin 22.093023255813947 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Factuality Margin 11.6279069767442 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #48 · #48 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 17, 2025 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
Gemini 2.5 Pro: $3.4375000000000004 per 1M blended tokens.
Gemini 3.8 Flash: $1.5 per 1M blended tokens.
Gemini 2.5 Pro: closed weights.
Gemini 3.8 Flash: closed weights.
General LLM: As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in General LLM at #7 against #78.
Reasoning: As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Reasoning at #6 against #92.
Science: As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Science at #4 against #58.
Coding › Web dev: As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Coding › Web dev at #29 against #119.
Long context: As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Long context at #5 against #72.
Factuality: As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Factuality at #19 against #37.
Abstraction (ARC): As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Abstraction (ARC) at #1 against #48.
Gemini 2.5 Pro · Gemini 3.8 Flash
Gemini 2.5 Pro or Gemini 3.8 Flash?
As of Oct 15, 2026, Gemini 2.5 Pro leads Gemini 3.8 Flash in 0 of 7 shared categories.
Gemini 2.5 Pro or Gemini 3.8 Flash for General LLM?
As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in General LLM at #7 against #78.
Gemini 2.5 Pro or Gemini 3.8 Flash for Reasoning?
As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Reasoning at #6 against #92.
Gemini 2.5 Pro or Gemini 3.8 Flash for Science?
As of Oct 15, 2026, Gemini 3.8 Flash leads Gemini 2.5 Pro in Science at #4 against #58.