Claude Mythos 5.1vsQwen2.5
Claude Mythos 5.1 | Qwen2.5 | |
|---|---|---|
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | — | 72B |
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 | Qwen |
| Release date | Sep 1 2026 | Sep 19 2024 |
| Access | Proprietary | Open Weight |
Other comparisons
Frequently asked questions
Claude Mythos 5.1 and Qwen2.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Qwen2.5 shipped 712 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 (Qwen2.5). Claude Mythos 5.1 is proprietary, while Qwen2.5 is open weight.
Direct benchmark comparisons are unavailable — Claude Mythos 5.1 and Qwen2.5 don't publish scores on any of the same benchmarks.
Claude Mythos 5.1 was released by Anthropic on Sep 1 2026.
Qwen2.5 was released by Qwen on Sep 19 2024.
Claude Mythos 5.1 has a 1M context window; Qwen2.5 has 128k.
Claude Mythos 5.1 is a proprietary model released by Anthropic. Qwen2.5 is an open weight model released by Qwen.