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. | 200k | 2M |
| Overview | ||
| Company | OpenAI | SpaceXSI |
| Release date | May 16 2025 | Sep 19 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
codex-mini-latestvsClaude Fable 5.2Grok 4 FastvsClaude Fable 5.2codex-mini-latestvsGemini 4 CarbonGrok 4 FastvsGemini 4 Carboncodex-mini-latestvsMuse EmberGrok 4 FastvsMuse Embercodex-mini-latestvsDeepSeek-V4.1-Flash-1017Grok 4 FastvsDeepSeek-V4.1-Flash-1017codex-mini-latestvsMistral Large 4Grok 4 FastvsMistral Large 4codex-mini-latestvsKimi K3.1 ProGrok 4 FastvsKimi K3.1 ProFrequently asked questions
codex-mini-latest and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. codex-mini-latest shipped 126 days before Grok 4 Fast, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (codex-mini-latest) vs 2M (Grok 4 Fast).
Direct benchmark comparisons are unavailable — codex-mini-latest and Grok 4 Fast don't publish scores on any of the same benchmarks.