# OpenAI o4 vs Gemini 3 Deep Think (2026): Benchmarks, Price & Verdict | Alher Tech

> OpenAI o4 vs Gemini 3 Deep Think: 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/o4-vs-gemini-3-deep-think/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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|  | OpenAI o4 | Gemini 3 Deep Think |
| --- | --- | --- |
| arenaElo | 1438 | 1429 |
| humanEval | 94 | 92.4 |
| sweBench | 72 | 64 |
| mmlu | 92.5 | 92.1 |
| gpqa | 87.1 | 84.3 |
| aime | 94 | 95 |
| Price in/out ($/M) | $12 / $48 | $14 / $56 |

## Our verdict

o4 is narrowly ahead on GPQA (87 vs 84) and HumanEval; Gemini 3 Deep Think wins on context (1M vs 256K) and pricing ($14 vs $12 input). For math olympiad-grade problems, both are usable: choose by ecosystem.

[OpenAI o4](https://alhertech.com/en/ai-comparison/o4/) · [Gemini 3 Deep Think](https://alhertech.com/en/ai-comparison/gemini-3-deep-think/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)