# Claude Sonnet 4.6 vs Claude Sonnet 4.5 (2026): Benchmarks, Price & Verdict | Alher Tech

> Claude Sonnet 4.6 vs Claude Sonnet 4.5: 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-sonnet-4-6-vs-claude-sonnet-4-5/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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|  | Claude Sonnet 4.6 | Claude Sonnet 4.5 |
| --- | --- | --- |
| arenaElo | 1358 | 1332 |
| humanEval | 89 | 86.1 |
| sweBench | 60 | 58 |
| mmlu | 88.7 | 86.9 |
| gpqa | 59.4 | 56.2 |
| aime | 80 | 76 |
| Price in/out ($/M) | $3 / $15 | $3 / $15 |

## Our verdict

Sonnet 4.6 adds ~3 HumanEval points and ~3 GPQA points over 4.5 with the same pricing and context window. Tool use is sharper and agent drift is lower. If you ship on Sonnet, 4.6 is a free quality upgrade: migrate.

[Claude Sonnet 4.6](https://alhertech.com/en/ai-comparison/claude-sonnet-4-6/) · [Claude Sonnet 4.5](https://alhertech.com/en/ai-comparison/claude-sonnet-4-5/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)