Gemini 3 Pro vs GPT-5.1 Codex High: Specs & Benchmark Comparison
| Characteristic | Gemini 3 Pro | GPT-5.1 Codex High |
|---|---|---|
| Company | OpenAI | |
| Release Date | November 17, 2025 | November 11, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 400K |
| Context (output) | 66K | 128K |
| Input Price / 1M | $2.00 | $1.25 |
| Output Price / 1M | $12.00 | $10.00 |
| Average Score | 0.9 | 1.0 |
| Benchmarks | ||
| AIME 2025 | 1.0 | 1.0 |
Visual Benchmark Comparison
Gemini 3 Pro
GPT-5.1 Codex High
AIME 20251.0 vs 1.0
1.0
1.0
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: Gemini 3 Pro — 0.9, GPT-5.1 Codex High — 1.0.
API Cost
GPT-5.1 Codex High is 1.2x cheaper: input $1.25/1M vs $2.00/1M tokens.
Context Window
Gemini 3 Pro supports a larger context: 1M vs 400K tokens.
Recency
Both models were released around the same time: 11/17/2025 and 11/11/2025.
More About These Models
Related Comparisons
The Gemini 3 Pro and GPT-5.1 Codex High comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Gemini 3 Pro or GPT-5.1 Codex High page. See also the complete list of AI model comparisons.