# GPT-5.5 vs Gemini 3 Ultra (2026): Benchmarks, Price & Verdict | Alher Tech

> GPT-5.5 vs Gemini 3 Ultra: 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/gpt-5-5-vs-gemini-3-ultra/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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|  | GPT-5.5 | Gemini 3 Ultra |
| --- | --- | --- |
| arenaElo | 1432 | 1441 |
| humanEval | 94.2 | 91 |
| sweBench | 66 | 66 |
| mmlu | 93 | 93.4 |
| gpqa | 68.7 | 72.6 |
| aime | 92 | 93 |
| Price in/out ($/M) | $12 / $48 | $18 / $72 |

## Our verdict

Gemini 3 Ultra has the larger context (3M) and native video; GPT-5.5 has tighter coding and the richest tool-calling ecosystem. Both sit within 10 Elo points of each other. Pick by cloud vendor or by whether video matters to you.

[GPT-5.5](https://alhertech.com/en/ai-comparison/gpt-5-5/) · [Gemini 3 Ultra](https://alhertech.com/en/ai-comparison/gemini-3-ultra/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)