# Claude Opus 4.8 vs GPT-5.5 (2026): Benchmarks, Price & Verdict | Alher Tech

> Claude Opus 4.8 vs GPT-5.5: 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-opus-4-8-vs-gpt-5-5/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

---

|  | Claude Opus 4.8 | GPT-5.5 |
| --- | --- | --- |
| arenaElo | 1435 | 1432 |
| humanEval | 94.5 | 94.2 |
| sweBench | 67 | 66 |
| mmlu | 93 | 93 |
| gpqa | 67.5 | 68.7 |
| aime | 90 | 92 |
| Price in/out ($/M) | $5 / $25 | $5 / $30 |

## Our verdict

On agentic coding Opus 4.8 leads at 69.2% SWE-Bench Pro vs 58.6% for GPT-5.5, and it tops the Super-Agent benchmark as the only model to complete every case end-to-end at parity on cost. Opus 4.8 is the pick for long-horizon autonomous agents and computer-use; GPT-5.5 remains a strong all-rounder where you are already invested in the OpenAI stack. As always, benchmark both on your real workload before committing.

[Claude Opus 4.8](https://alhertech.com/en/ai-comparison/claude-opus-4-8/) · [GPT-5.5](https://alhertech.com/en/ai-comparison/gpt-5-5/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)