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 | 200k |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | — | $2.00 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | — | $8.00 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | — | $0.50 |
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. | — | $2.00OpenAI |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | — | $8.00OpenAI |
| — | $800OpenAI list price | |
| 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. | — | 26% |
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 | Apr 16 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude 3 SonnetvsGemini 4 Argono3vsGemini 4 ArgonClaude 3 SonnetvsMuse Spark Openo3vsMuse Spark OpenClaude 3 SonnetvsGrok 4.7o3vsGrok 4.7Claude 3 SonnetvsDeepSeek-V4.1-Flash-1017o3vsDeepSeek-V4.1-Flash-1017Claude 3 SonnetvsMistral Large 4o3vsMistral Large 4Claude 3 SonnetvsKimi K3o3vsKimi K3Frequently asked questions
Claude 3 Sonnet and o3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only o3 has a verified first-party API price: $2.00 per million input tokens and $8.00 per million output tokens. No pay-as-you-go API rate is tracked for Claude 3 Sonnet. Claude 3 Sonnet shipped 408 days before o3, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (Claude 3 Sonnet) vs 200k (o3).
Direct benchmark comparisons are unavailable — Claude 3 Sonnet and o3 don't publish scores on any of the same benchmarks.