Google Gemini 1.0 Ultra vs OpenAI GPT-5.1-Codex-Max — side-by-side specs.
Google Gemini 1.0 Ultra | OpenAI GPT-5.1-Codex-Max | |
|---|---|---|
| Overview | ||
| Company | OpenAI | |
| Release date | Feb 8 2024 | Nov 19 2025 |
| Model type | — | — |
| Open source | No | No |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
| Timeline | ||
| Release gap | Gemini 1.0 Ultra shipped 650 days before GPT-5.1-Codex-Max | |
Gemini 1.0 Ultra and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.0 Ultra shipped 650 days before GPT-5.1-Codex-Max, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — Gemini 1.0 Ultra and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks.