# GPT-5 mini vs Gemini 3 Flash (2026): Benchmarks, Price & Verdict | Alher Tech

> GPT-5 mini vs Gemini 3 Flash: 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-mini-vs-gemini-3-flash/
- 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 mini | Gemini 3 Flash |
| --- | --- | --- |
| arenaElo | 1288 | 1298 |
| humanEval | 81 | 79.4 |
| sweBench | 50 | 48 |
| mmlu | 82.4 | 83.2 |
| gpqa | 50.1 | 51.8 |
| aime | 78 | 76 |
| Price in/out ($/M) | $0.25 / $2 | $0.3 / $2.5 |

## Our verdict

GPT-5 mini is marginally smarter at $0.25/M input; Gemini 3 Flash costs slightly more but brings a 1M context window. For chat UX at scale, GPT-5 mini. For cheap long-doc jobs, Gemini 3 Flash.

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