# Codex CLI vs DeepSeek V3 (2026): Benchmarks, Price & Verdict | Alher Tech

> Codex CLI vs DeepSeek V3: 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/codex-cli-vs-deepseek-v3/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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|  | Codex CLI | DeepSeek V3 |
| --- | --- | --- |
| arenaElo | 1408 | 1355 |
| humanEval | 95.5 | 86 |
| sweBench | 70 | 42 |
| mmlu | 88.6 | 88.5 |
| gpqa | 60.8 | 59.1 |
| aime | 86 | 59.4 |
| Price in/out ($/M) | $9 / $36 | $0.27 / $1.1 |

## Our verdict

If your B2B SaaS client requires on-prem inference (healthcare, defense, banking), you can't ship runtime features on OpenAI. Use Codex CLI during delivery with OpenAI credentials, then serve end-user AI features on a self-hosted DeepSeek V3. Best of both worlds.

[Codex CLI](https://alhertech.com/en/ai-comparison/codex-cli/) · [DeepSeek V3](https://alhertech.com/en/ai-comparison/deepseek-v3/) · [All AI model comparisons](https://alhertech.com/en/ai-comparison/)