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. | 9k | 400k |
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Mar 14 2023 | Nov 13 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude 1vsGemini 4 CarbonGPT-5.1-Codex-MinivsGemini 4 CarbonClaude 1vsMuse EmberGPT-5.1-Codex-MinivsMuse EmberClaude 1vsGrok 4.7GPT-5.1-Codex-MinivsGrok 4.7Claude 1vsDeepSeek-V4.1-Flash-1017GPT-5.1-Codex-MinivsDeepSeek-V4.1-Flash-1017Claude 1vsMistral Large 4GPT-5.1-Codex-MinivsMistral Large 4Claude 1vsKimi K3.1 ProGPT-5.1-Codex-MinivsKimi K3.1 ProFrequently asked questions
Claude 1 and GPT-5.1-Codex-Mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 1 shipped 975 days before GPT-5.1-Codex-Mini, so benchmark comparisons should account for the intervening progress.
Context windows are 9k (Claude 1) vs 400k (GPT-5.1-Codex-Mini).
Direct benchmark comparisons are unavailable — Claude 1 and GPT-5.1-Codex-Mini don't publish scores on any of the same benchmarks.