Claude Mythos 5.1vsKimi K1.5
Claude Mythos 5.1 | Kimi K1.5 | |
|---|---|---|
| Specifications | ||
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 1M | 128k |
| BenchmarksPublished by one model only | ||
Terminal-Bench 4.0Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Version 4.0 recalibrated how much time, CPU and memory each task gets, removed eight tasks and fixed nineteen, so fewer runs fail for reasons that have nothing to do with the model. Scores are not comparable with earlier versions. Higher is better. | 60.9% | — |
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Sep 1 2026 | Jan 20 2025 |
| Access | Proprietary | Proprietary |
Other comparisons
Claude Mythos 5.1vsGPT-5.6 SolKimi K1.5vsGPT-5.6 SolClaude Mythos 5.1vsGemini 3.7 FlashKimi K1.5vsGemini 3.7 FlashClaude Mythos 5.1vsMuse GlimmerKimi K1.5vsMuse GlimmerClaude Mythos 5.1vsGrok 4.6Kimi K1.5vsGrok 4.6Claude Mythos 5.1vsDeepSeek-V4-Pro-0813Kimi K1.5vsDeepSeek-V4-Pro-0813Claude Mythos 5.1vsMistral Medium 3.5Kimi K1.5vsMistral Medium 3.5
Frequently asked questions
Claude Mythos 5.1 and Kimi K1.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi K1.5 shipped 589 days before Claude Mythos 5.1, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Claude Mythos 5.1) vs 128k (Kimi K1.5).
Direct benchmark comparisons are unavailable — Claude Mythos 5.1 and Kimi K1.5 don't publish scores on any of the same benchmarks.
Claude Mythos 5.1 was released by Anthropic on Sep 1 2026.
Kimi K1.5 was released by Moonshot AI on Jan 20 2025.
Claude Mythos 5.1 has a 1M context window; Kimi K1.5 has 128k.