Compare AI models
| Specifications | ||
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 9k | — |
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Mar 14 2023 | Sep 19 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude 1vsGPT-6.1 SolGrok 4 FastvsGPT-6.1 SolClaude 1vsGemini 4 ArgonGrok 4 FastvsGemini 4 ArgonClaude 1vsMuse Spark 1.3Grok 4 FastvsMuse Spark 1.3Claude 1vsDeepSeek-V4.1-FlashGrok 4 FastvsDeepSeek-V4.1-FlashClaude 1vsMistral Large 4Grok 4 FastvsMistral Large 4Claude 1vsKimi K3Grok 4 FastvsKimi K3Frequently asked questions
Claude 1 and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 1 shipped 920 days before Grok 4 Fast, 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 — Claude 1 and Grok 4 Fast don't publish scores on any of the same benchmarks.