# Claude Fable 5 vs Claude Mythos 5 (2026): Benchmarks, Price & Verdict | Alher Tech

> Claude Fable 5 vs Claude Mythos 5: 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-fable-5-vs-claude-mythos-5/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

---

|  | Claude Fable 5 | Claude Mythos 5 |
| --- | --- | --- |
| arenaElo | 1492 | 1493 |
| humanEval | 98 | 98 |
| sweBench | 77 | 78 |
| mmlu | 95.1 | 95.1 |
| gpqa | 92 | 92 |
| aime | 94 | 94.5 |
| Price in/out ($/M) | $10 / $50 | $10 / $50 |

## Our verdict

These are the same model on two access paths: identical capabilities, $10 / $50 per M tokens, 1M context, 128K output and always-on protected thinking. Fable 5 is generally available on the Claude API; Mythos 5 is the Project Glasswing successor to the Mythos Preview. Unless you are inside Project Glasswing, Fable 5 is the one you can actually ship on, and there is no capability you give up by choosing it.

[Claude Fable 5](https://alhertech.com/en/ai-comparison/claude-fable-5/) · [Claude Mythos 5](https://alhertech.com/en/ai-comparison/claude-mythos-5/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)