# OpenAI o4 vs OpenAI o3 (2026): Benchmarks, Price & Verdict | Alher Tech

> OpenAI o4 vs OpenAI o3: 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-o3/
- 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 | OpenAI o3 |
| --- | --- | --- |
| arenaElo | 1438 | 1418 |
| humanEval | 94 | 92.4 |
| sweBench | 72 | 69.1 |
| mmlu | 92.5 | 90.2 |
| gpqa | 87.1 | 83.3 |
| aime | 94 | 91.6 |
| Price in/out ($/M) | $12 / $48 | $10 / $40 |

## Our verdict

o4 tops o3 on every reasoning benchmark (GPQA 87 vs 83, MMLU 92.5 vs 90.2) at a ~20% lower list price. Unless you have o3 pinned by contract, o4 is a straight upgrade for reasoning-heavy agents.

[OpenAI o4](https://alhertech.com/en/ai-comparison/o4/) · [OpenAI o3](https://alhertech.com/en/ai-comparison/o3/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)