Compare AI models
| API pricingUSD per 1M tokens · lower wins | ||
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $3.00Amazon Bedrock | — |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | $15.00Amazon Bedrock | — |
| $1,350Amazon Bedrock | — | |
| Benchmarks | ||
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. | 30% | 39% |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 72.7% | — |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 75.4% | — |
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | May 22 2025 | Sep 15 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude Sonnet 4vsGemini 4 ArgonGPT-5-CodexvsGemini 4 ArgonClaude Sonnet 4vsMuse WonderGPT-5-CodexvsMuse WonderClaude Sonnet 4vsGrok 4.7GPT-5-CodexvsGrok 4.7Claude Sonnet 4vsDeepSeek-V4.1-FlashGPT-5-CodexvsDeepSeek-V4.1-FlashClaude Sonnet 4vsMistral Large 4GPT-5-CodexvsMistral Large 4Claude Sonnet 4vsKimi K3GPT-5-CodexvsKimi K3Frequently asked questions
GPT-5-Codex leads Claude Sonnet 4 on 1 of the 1 benchmark they both report (BullshitBench v2). Claude Sonnet 4 shipped 116 days before GPT-5-Codex, 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.
On BullshitBench v2, GPT-5-Codex leads at 39% vs Claude Sonnet 4 at 30%.