# Claude Mythos vs Claude Opus 4.8 (2026): Benchmarks, Price & Verdict | Alher Tech

> Claude Mythos vs Claude Opus 4.8: 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-claude-opus-4-8/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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|  | Claude Mythos | Claude Opus 4.8 |
| --- | --- | --- |
| arenaElo | 1478 | 1435 |
| humanEval | 98.7 | 94.5 |
| sweBench | 93.9 | 67 |
| mmlu | 94.2 | 93 |
| gpqa | 94.6 | 67.5 |
| aime | 97.6 | 90 |
| Price in/out ($/M) | $25 / $125 | $5 / $25 |

## Our verdict

Mythos posts higher raw benchmarks but stays a gated research preview at 5× the price. Opus 4.8 is the practical frontier you can actually ship on, generally available across Anthropic API, Bedrock and Vertex AI at $5 / $25 per M tokens, leading agentic coding and computer use. Pick Mythos only if Anthropic green-lit your use case; otherwise Opus 4.8 is the default for production.

[Claude Mythos](https://alhertech.com/en/ai-comparison/claude-mythos/) · [Claude Opus 4.8](https://alhertech.com/en/ai-comparison/claude-opus-4-8/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)