Compare AI models
| Specifications | ||
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality. | 48B | — |
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. | 1M | 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. | — | $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 | |
| These models have no shared benchmark scores. | ||
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 | Moonshot AI | SpaceXSI |
| Release date | Oct 30 2025 | Aug 28 2025 |
| Access | Open Weight | Closed |
| Model details | View model | View model |
Other comparisons
Kimi LinearvsClaude Haiku 5.5Grok Code Fast 1vsClaude Haiku 5.5Kimi LinearvsGPT-6.1 SolGrok Code Fast 1vsGPT-6.1 SolKimi LinearvsGemini 4 ArgonGrok Code Fast 1vsGemini 4 ArgonKimi LinearvsMuse Spark OpenGrok Code Fast 1vsMuse Spark OpenKimi LinearvsDeepSeek-V4.1-Flash-1017Grok Code Fast 1vsDeepSeek-V4.1-Flash-1017Kimi LinearvsMistral Large 4Grok Code Fast 1vsMistral Large 4Frequently asked questions
Kimi Linear and Grok Code Fast 1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. 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 Kimi Linear. Grok Code Fast 1 shipped 63 days before Kimi Linear, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Kimi Linear) vs 256k (Grok Code Fast 1). Kimi Linear is open weight, while Grok Code Fast 1 is closed.
Direct benchmark comparisons are unavailable — Kimi Linear and Grok Code Fast 1 don't publish scores on any of the same benchmarks.