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. | 2.8T | — |
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 |
| Overview | ||
| Company | Moonshot AI | SpaceXSI |
| Release date | Oct 23 2026 | Jul 9 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Kimi K3.1 Pro HighspeedvsClaude Haiku 5.5Grok 4vsClaude Haiku 5.5Kimi K3.1 Pro HighspeedvsGPT-6.1 SolGrok 4vsGPT-6.1 SolKimi K3.1 Pro HighspeedvsGemini 4 ArgonGrok 4vsGemini 4 ArgonKimi K3.1 Pro HighspeedvsMuse Spark OpenGrok 4vsMuse Spark OpenKimi K3.1 Pro HighspeedvsDeepSeek-V4.1-Flash-1017Grok 4vsDeepSeek-V4.1-Flash-1017Kimi K3.1 Pro HighspeedvsMistral Large 4Grok 4vsMistral Large 4Frequently asked questions
Kimi K3.1 Pro Highspeed and Grok 4 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 4 shipped 471 days before Kimi K3.1 Pro Highspeed, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Kimi K3.1 Pro Highspeed) vs 256k (Grok 4).
Direct benchmark comparisons are unavailable — Kimi K3.1 Pro Highspeed and Grok 4 don't publish scores on any of the same benchmarks.