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 | 2M |
| 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. | — | 19% |
| Overview | ||
| Company | Moonshot AI | SpaceXSI |
| Release date | Oct 23 2026 | Nov 19 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Kimi K3.1 Pro HighspeedvsClaude Haiku 5.5Grok 4.1 FastvsClaude Haiku 5.5Kimi K3.1 Pro HighspeedvsGPT-6.1 SolGrok 4.1 FastvsGPT-6.1 SolKimi K3.1 Pro HighspeedvsGemini 4 ArgonGrok 4.1 FastvsGemini 4 ArgonKimi K3.1 Pro HighspeedvsMuse Spark OpenGrok 4.1 FastvsMuse Spark OpenKimi K3.1 Pro HighspeedvsDeepSeek-V4.1-Flash-1017Grok 4.1 FastvsDeepSeek-V4.1-Flash-1017Kimi K3.1 Pro HighspeedvsMistral Large 4Grok 4.1 FastvsMistral Large 4Frequently asked questions
Kimi K3.1 Pro Highspeed and Grok 4.1 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 4.1 Fast shipped 338 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 2M (Grok 4.1 Fast).
Direct benchmark comparisons are unavailable — Kimi K3.1 Pro Highspeed and Grok 4.1 Fast don't publish scores on any of the same benchmarks.