# Claude Mythos vs DeepSeek V4 (2026): Benchmarks, Price & Verdict | Alher Tech

> Claude Mythos vs DeepSeek V4: head-to-head 2026 comparison across Arena Elo, MMLU, GPQA, HumanEval, context window and pricing. Verdict + use cases.

- Canonical page: https://alhertech.com/en/ai-comparison/claude-mythos-vs-deepseek-v4/
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- Contact: https://alhertech.com/en/contact/

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|  | Claude Mythos | DeepSeek V4 |
| --- | --- | --- |
| arenaElo | 1478 | 1395 |
| humanEval | 98.7 | 91 |
| sweBench | 93.9 | 62 |
| mmlu | 94.2 | 91.5 |
| gpqa | 94.6 | 73 |
| aime | 97.6 | 90 |
| Price in/out ($/M) | $25 / $125 | $1.74 / $3.48 |

## Our verdict

DeepSeek V4 is the open-weights flagship of 2026: MIT-licensed, 1M context, ~14× cheaper input than Mythos, and self-hostable. Mythos retains the capability lead by 20+ points on GPQA and SWE-bench, plus its cybersecurity capabilities are unmatched. Pick V4 for any team that needs to deploy frontier-tier reasoning on its own hardware or under data residency requirements. Pick Mythos only if you have access and your use case justifies a 14× per-token cost.

[Claude Mythos](https://alhertech.com/en/ai-comparison/claude-mythos/) · [DeepSeek V4](https://alhertech.com/en/ai-comparison/deepseek-v4/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)