Claude Opus 5 vs Gemini 2.5 Flash Preview 09 2025
As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
Gemini 2.5 Flash Preview 09 2025
#88 Best current rank: #88 in Factuality, as of Oct 14, 2026.
| Category | Claude Opus 5 | Gemini 2.5 Flash Preview 09 2025 |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #111 · #111 in General LLM Margin 75.51020408163265 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #112 · #112 in Reasoning Margin 77.3972602739726 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #105 · #105 in Long context Margin 71.42857142857143 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #88 · #88 in Factuality Margin 66.41791044776119 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
Claude Opus 5: $10 per 1M blended tokens.
Gemini 2.5 Flash Preview 09 2025: price per 1M tokens is unset in the catalog.
Claude Opus 5: closed weights.
Gemini 2.5 Flash Preview 09 2025: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in General LLM at #11 against #111.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in Reasoning at #9 against #112.
Long context: As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in Long context at #9 against #105.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in Factuality at #4 against #88.
Claude Opus 5 · Gemini 2.5 Flash Preview 09 2025
Claude Opus 5 or Gemini 2.5 Flash Preview 09 2025?
As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 5 or Gemini 2.5 Flash Preview 09 2025 for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in General LLM at #11 against #111.
Claude Opus 5 or Gemini 2.5 Flash Preview 09 2025 for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in Reasoning at #9 against #112.
Claude Opus 5 or Gemini 2.5 Flash Preview 09 2025 for Long context?
As of Oct 14, 2026, Claude Opus 5 leads Gemini 2.5 Flash Preview 09 2025 in Long context at #9 against #105.