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 | 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% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 40.4% | — |
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Mar 4 2024 | Sep 15 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude 3 SonnetvsGemini 4 ArgonGPT-5-CodexvsGemini 4 ArgonClaude 3 SonnetvsMuse Spark OpenGPT-5-CodexvsMuse Spark OpenClaude 3 SonnetvsGrok 4.7GPT-5-CodexvsGrok 4.7Claude 3 SonnetvsDeepSeek-V4.1-Flash-1017GPT-5-CodexvsDeepSeek-V4.1-Flash-1017Claude 3 SonnetvsMistral Large 4GPT-5-CodexvsMistral Large 4Claude 3 SonnetvsKimi K3GPT-5-CodexvsKimi K3Frequently asked questions
Claude 3 Sonnet and GPT-5-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3 Sonnet shipped 560 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (Claude 3 Sonnet) vs 400k (GPT-5-Codex).
Direct benchmark comparisons are unavailable — Claude 3 Sonnet and GPT-5-Codex don't publish scores on any of the same benchmarks.