Compare AI models
| Specifications | ||
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 32k | 400k |
| These models have no shared benchmark scores. | ||
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 39% |
| Overview | ||
| Company | OpenAI | |
| Release date | Feb 8 2024 | Sep 15 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Gemini 1.0 UltravsClaude Haiku 5.5GPT-5-CodexvsClaude Haiku 5.5Gemini 1.0 UltravsMuse Spark OpenGPT-5-CodexvsMuse Spark OpenGemini 1.0 UltravsGrok 4.7GPT-5-CodexvsGrok 4.7Gemini 1.0 UltravsDeepSeek-V4.1-Flash-1017GPT-5-CodexvsDeepSeek-V4.1-Flash-1017Gemini 1.0 UltravsMistral Large 4GPT-5-CodexvsMistral Large 4Gemini 1.0 UltravsKimi K3GPT-5-CodexvsKimi K3Frequently asked questions
Gemini 1.0 Ultra and GPT-5-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.0 Ultra shipped 585 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
Context windows are 32k (Gemini 1.0 Ultra) vs 400k (GPT-5-Codex).
Direct benchmark comparisons are unavailable — Gemini 1.0 Ultra and GPT-5-Codex don't publish scores on any of the same benchmarks.