GPT-5.6

GPT-5.6 family launches in general availability with Sol, Terra, and Luna. Sol scores 53.6 on Agents' Last Exam, 80 on the Artificial Analysis Coding Agent Index, 92.2% on BrowseComp, and 62.6% on OSWorld 2.0. Terra and Luna outperform Fable 5 at around one-sixteenth the cost.

OpenAI | In Edition 42, Saturday 11 Jul 2026

SOURCE OpenAI, GPT-5.6: Frontier intelligence that scales with your ambition

Added to The Deploy Log Monday 14 Sep 2026, updated Thursday 17 Sep 2026. Read Edition 42, the edition that carried it.

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