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 | 256k |
| API pricingUSD per 1M tokens · lower wins · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $2.00 | $1.00 |
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 | $2.00 |
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 | $0.20 |
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 | $300SpaceXSI 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% | — |
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. | — | 70.8% |
| Overview | ||
| Company | OpenAI | SpaceXSI |
| Release date | Apr 16 2025 | Aug 28 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
o3vsClaude Haiku 5.5Grok Code Fast 1vsClaude Haiku 5.5o3vsGemini 4 ArgonGrok Code Fast 1vsGemini 4 Argono3vsMuse Spark OpenGrok Code Fast 1vsMuse Spark Openo3vsDeepSeek-V4.1-Flash-1017Grok Code Fast 1vsDeepSeek-V4.1-Flash-1017o3vsMistral Large 4Grok Code Fast 1vsMistral Large 4o3vsKimi K3Grok Code Fast 1vsKimi K3Frequently asked questions
o3 and Grok Code Fast 1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok Code Fast 1 is cheaper on both input and output: $1.00 vs $2.00 per million input tokens, and $2.00 vs $8.00 per million output tokens. Figures are base-tier rates. o3 shipped 134 days before Grok Code Fast 1, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (o3) vs 256k (Grok Code Fast 1).
Direct benchmark comparisons are unavailable — o3 and Grok Code Fast 1 don't publish scores on any of the same benchmarks.