AI THREAT TRACKER / EV-046 · Model release

OpenAI introduces GPT-5.6 Sol

Sol, Terra and Luna extend agentic work across a new model generation.

Model labOpenAI

TopicsModel release

OCCURRED26 Jun 2026

PUBLIC ACCOUNT26 Jun 2026

EVIDENCEFirst-party account

About these dates

Date of the developer announcement or dated release record.

OpenAI began a limited partner preview of GPT-5.6 Sol on June 26, describing improvements in coding and other extended tasks. OpenAI ↗

On July 9, OpenAI began general rollout of the GPT-5.6 family in ChatGPT, Codex and the API. Sol is the flagship, with Terra and Luna offered as other tiers. OpenAI ↗

Sources & attribution

Organizational disclosure 26 Jun 2026
OpenAI introduces the GPT-5.6 family ↗
OpenAI. Original developer announcement.
Organizational disclosure 9 Jul 2026
Introducing GPT-5.6 ↗
OpenAI. Original developer announcement.