Gemini 2.5 Pro ExperimentalvsGPT-5.1-Codex
Gemini 2.5 Pro Experimental is cheaper than GPT-5.1-Codex at $1/M vs $1.25/M input tokens.
| Spec | Gemini 2.5 Pro Experimental | GPT-5.1-Codex |
|---|---|---|
| Input price | $1/M tokens | $1.25/M tokens |
| Output price | $2/M tokens | $10/M tokens |
| Context window | 1.0M tokens | 400K tokens |
| Released | Mar 2025 | Nov 2025 |
| SWE-bench Verified | 63.8% | 73.7% |
Our Verdict
Gemini 2.5 Pro Experimental
GPT-5.1-Codex
Not enough votes to call it. On the specs, nothing separates them.
Gemini 2.5 Pro Experimental costs 5.0x less per token.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Pro Experimental
Input
$1.00
1.3× cheaper
Output
$2.00
5.0× cheaper
GPT-5.1-Codex
Input
$1.25
Output
$10.00
Gemini 2.5 Pro Experimental is cheaper on both — 1.3× input, 5.0× output
Writing DNA
Style Comparison
Similarity
49%
GPT-5.1-Codex uses 2.2x more transitions
Gemini 2.5 Pro Experimental
GPT-5.1-Codex
54%Vocabulary70%
15wSentence Length17w
0.35Hedging0.39
5.6Bold3.4
3.9Lists3.5
0.00Emoji0.00
0.39Headings0.50
0.17Transitions0.38
Based on 18 + 14 text responses
Research
What we learned reading every model
FAQ
Common questions
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