Gemini 2.5 Pro Preview 05-06 vs GPT-5.1-Codex-Max
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Gemini 2.5 Pro Preview 05-06 and GPT-5.1-Codex-Max.
Gemini 2.5 Pro Preview 05-06
Gemini 2.5 Pro is Google’s state-of-the-art AI model designed for advanced reasoning, coding, mathematics, and scientific tasks. It employs “thinking” capabilities, enabling it to reason through responses with enhanced accuracy...
GPT-5.1-Codex-Max
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
Technical Specifications
| Specification | Gemini 2.5 Pro Preview 05-06 | GPT-5.1-Codex-Max |
|---|---|---|
| Provider | OpenAI | |
| Context Window | 1,048,576 tokens | 400,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | beta | stable |
| API Available | Yes | Yes |
| Released Date | 2025-05-07 | 2025-12-04 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 2.5 Pro Preview 05-06
$1.25
GPT-5.1-Codex-Max
$1.25
Output Price per Million Tokens
Gemini 2.5 Pro Preview 05-06
$10.00
GPT-5.1-Codex-Max
$10.00
Want to test both models live?
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Gemini 2.5 Pro Preview 05-06 Quirks & Gotchas
No developer gotchas reported.
GPT-5.1-Codex-Max Quirks & Gotchas
No developer gotchas reported.