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. | — | $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. | — | $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. | — | $0.20 |
| — | $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. | 40.6% | 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. | 50% | — |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 41.6% | — |
| Overview | ||
| Company | Anthropic | SpaceXSI |
| Release date | Oct 22 2024 | Aug 28 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude 3.5 HaikuvsGPT-6.1 SolGrok Code Fast 1vsGPT-6.1 SolClaude 3.5 HaikuvsGemini 4 ArgonGrok Code Fast 1vsGemini 4 ArgonClaude 3.5 HaikuvsMuse WonderGrok Code Fast 1vsMuse WonderClaude 3.5 HaikuvsDeepSeek-V4.1-FlashGrok Code Fast 1vsDeepSeek-V4.1-FlashClaude 3.5 HaikuvsMistral Large 4Grok Code Fast 1vsMistral Large 4Claude 3.5 HaikuvsKimi K3Grok Code Fast 1vsKimi K3Frequently asked questions
Grok Code Fast 1 leads Claude 3.5 Haiku on 1 of the 1 benchmark they both report (SWE-Bench Verified). Only Grok Code Fast 1 has a verified first-party API price: $1.00 per million input tokens and $2.00 per million output tokens. No pay-as-you-go API rate is tracked for Claude 3.5 Haiku. Claude 3.5 Haiku shipped 310 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 Claude 3.5 Haiku at 40.6%.