Claude Opus 4.5 vs Gemini 3.5 Flash
Gemini 3.5 Flash leads in 3 of 8 categories
Arena ELO
Claude Opus 4.5
Cheaper
Gemini 3.5 Flash
Faster
Claude Opus 4.5
Detailed Comparison
| Category | Claude Opus 4.5 | Gemini 3.5 Flash |
|---|---|---|
| Provider | Anthropic | |
| Context Window | 200K | 1M WIN |
| Input Price ($/1M) | $5 | $1.5 WIN |
| Output Price ($/1M) | $25 | $9 WIN |
| Arena ELO | 1380 WIN | N/A |
| Coding | 80.9% SWE-bench | N/A |
| Reasoning | unknown | N/A |
| Speed (tokens/sec) | ~35 t/s WIN | N/A |
| Open Source | No | No |
Frequently Asked Questions
Which is cheaper, Claude Opus 4.5 or Gemini 3.5 Flash?
Gemini 3.5 Flash is approximately 65% cheaper than Claude Opus 4.5 per million tokens.
Which is better for coding, Claude Opus 4.5 or Gemini 3.5 Flash?
Claude Opus 4.5 scores 80.9% SWE-bench on coding benchmarks, while Gemini 3.5 Flash scores N/A.
Which has a larger context window?
Claude Opus 4.5 supports 200K context, while Gemini 3.5 Flash supports 1M.
Is Claude Opus 4.5 or Gemini 3.5 Flash open source?
Claude Opus 4.5 is proprietary. Gemini 3.5 Flash is proprietary.
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