GPT-5.6 Luna vs. GPT-6 Astra: Is a $1.20 Model Good Enough for Code Review?
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GPT-5.6
GPT-5.6 by OpenAI — specifications, pricing and published benchmark scores, with community links.
| Organization | OpenAI |
|---|---|
| Released | 2026-07 |
| License | Proprietary |
| Open weights | No |
| Context window | 1,050,000 tokens |
| Modality | text, image, pdf |
| Input price | $4 / 1M |
| Output price | $20 / 1M |