Claude Opus 4.5vsGemini 2.5 Pro Experimental
Claude Opus 4.5 is the newer model, released after Gemini 2.5 Pro Experimental.
| Spec | Claude Opus 4.5 | Gemini 2.5 Pro Experimental |
|---|---|---|
| Input price | — | $1/M tokens |
| Output price | — | $2/M tokens |
| Context window | — | 1.0M tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Mar 2025 |
| SWE-bench Verified | 80.9% | 63.8% |
Our Verdict
Claude Opus 4.5
Gemini 2.5 Pro Experimental
Not enough votes to call it. On the specs, nothing separates them.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4.5
Input
—
Output
—
Gemini 2.5 Pro Experimental
Input
$1.00
Output
$2.00
Where to run it
6 hosts, cheapest first
Gemini 2.5 Pro Experimental2 hosts
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Writing DNA
Style Comparison
Similarity
27%
Claude Opus 4.5 uses 18.5x more emoji
Claude Opus 4.5
Gemini 2.5 Pro Experimental
66%Vocabulary54%
51wSentence Length15w
0.82Hedging0.35
6.0Bold5.6
4.5Lists3.9
0.18Emoji0.00
1.46Headings0.39
0.05Transitions0.17
Based on 27 + 18 text responses
Research
What we learned reading every model
FAQ
Common questions
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