Claude Opus 4.6 vs Gemini 2.5 Flash Preview 09 2025
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
Gemini 2.5 Flash Preview 09 2025
#88 Best current rank: #88 in Factuality, as of Oct 14, 2026.
| Category | Claude Opus 4.6 | Gemini 2.5 Flash Preview 09 2025 |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #111 · #111 in General LLM Margin 75.51020408163265 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #112 · #112 in Reasoning Margin 77.3972602739726 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | — |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #105 · #105 in Long context Margin 71.42857142857143 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #88 · #88 in Factuality Margin 66.41791044776119 LMArena leaderboard dataset · Oct 13, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
Gemini 2.5 Flash Preview 09 2025: price per 1M tokens is unset in the catalog.
Claude Opus 4.6: closed weights.
Gemini 2.5 Flash Preview 09 2025: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in General LLM at #4 against #111.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in Reasoning at #2 against #112.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in Long context at #2 against #105.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in Factuality at #3 against #88.
Claude Opus 4.6 · Gemini 2.5 Flash Preview 09 2025
Claude Opus 4.6 or Gemini 2.5 Flash Preview 09 2025?
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6 or Gemini 2.5 Flash Preview 09 2025 for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in General LLM at #4 against #111.
Claude Opus 4.6 or Gemini 2.5 Flash Preview 09 2025 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in Reasoning at #2 against #112.
Claude Opus 4.6 or Gemini 2.5 Flash Preview 09 2025 for Long context?
As of Oct 14, 2026, Claude Opus 4.6 leads Gemini 2.5 Flash Preview 09 2025 in Long context at #2 against #105.