# Claude Mythos Review & Benchmarks (2026): Price, Context, Specs | Alher Tech

> Claude Mythos by Anthropic: benchmarks, pricing, context window, strengths and use cases. Data from official benchmark sources.

- Canonical page: https://alhertech.com/en/ai-comparison/claude-mythos/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
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Last updated: May 9, 2026

## Specs

- **Vendor**: Anthropic
- **Released**: April 8, 2026
- **Context window**: 1M tokens
- **Input**: $25 / M tokens
- **Output**: $125 / M tokens

## Benchmarks

- **mmlu**: 94.2
- **gpqa**: 94.6
- **humanEval**: 98.7
- **arenaElo**: 1478
- **sweBench**: 93.9
- **sweBenchPro**: 88
- **liveCodeBench**: 90
- **aiderPolyglot**: 90
- **terminalBench**: 65
- **mmluPro**: 91
- **hle**: 35
- **aime**: 97.6
- **math500**: 99.5
- **mmmu**: 85

## Strengths

- Frontier of frontiers: 93.9% SWE-bench Verified, 97.6% USAMO 2026, 94.6% GPQA Diamond
- 4.3× jump over the previous performance trendline; saturates Cybench at 100% pass@1
- Long-context that actually holds: 80% on GraphWalks BFS at 1M tokens vs 21.4% from GPT-5.4

## Weaknesses

- Gated research preview: only Project Glasswing partners and a handful of vetted critical-infrastructure operators get keys
- List price is 5× Opus 4.7 ($25 / $125 per million tokens) when access is granted
- No general API self-serve: Anthropic states it does not plan to release Mythos publicly

## Best for

- Defensive cybersecurity research at nation-scale (zero-day discovery + patch authoring)
- Mathematical proof generation and graduate-level scientific reasoning
- Long-horizon coding agents that need to reason across an entire codebase in a single window

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