Compare AI models
| 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. | $2.00Azure | — |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | $8.00Azure | — |
| $800OpenAI list price | $300SpaceXSI list price | |
| Benchmarks | ||
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. | 54.6% | 70.8% |
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. | 14% | — |
| Overview | ||
| Company | OpenAI | SpaceXSI |
| Release date | Apr 14 2025 | Aug 28 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
GPT-4.1vsClaude Haiku 5.5Grok Code Fast 1vsClaude Haiku 5.5GPT-4.1vsGemini 4 ArgonGrok Code Fast 1vsGemini 4 ArgonGPT-4.1vsMuse Spark OpenGrok Code Fast 1vsMuse Spark OpenGPT-4.1vsDeepSeek-V4.1-FlashGrok Code Fast 1vsDeepSeek-V4.1-FlashGPT-4.1vsMistral Large 4Grok Code Fast 1vsMistral Large 4GPT-4.1vsKimi K3Grok Code Fast 1vsKimi K3Frequently asked questions
Grok Code Fast 1 leads GPT-4.1 on 1 of the 1 benchmark they both report (SWE-Bench Verified). 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. GPT-4.1 shipped 136 days before Grok Code Fast 1, 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 SWE-Bench Verified, Grok Code Fast 1 leads at 70.8% vs GPT-4.1 at 54.6%.