| Codex CLI | GPT-5.5 | |
|---|---|---|
| arenaElo | 1408 | 1432 |
| humanEval | 95.5 | 94.2 |
| sweBench | 70 | 66 |
| mmlu | 88.6 | 93 |
| gpqa | 60.8 | 68.7 |
| aime | 86 | 92 |
| Price in/out ($/M) | $9 / $36 | $12 / $48 |
Use Codex CLI to write the SaaS (backend, billing, auth, tests). Use GPT-5.5 inside the SaaS to power voice, vision and tool-calling features your B2B clients actually charge for. Most Alher Tech enterprise deliveries run this exact split.