Model Releases
GPT‑6 Sol and Luna build on Astra’s advances in alignment, showing improvements over their GPT-5.6 counterparts.
OpenAI announced the GPT‑6 Sol and Luna models on September 22 2026. These variants incorporate advances from the Astra project, yielding improved alignment safety relative to earlier GPT‑5.6 systems.
OpenAI announced the GPT‑6 Sol and Luna models on September 22 2026.
These variants incorporate advances from the Astra project, yielding improved alignment safety relative to earlier GPT‑5.6 systems.
The release highlighted enhanced performance metrics and noted wide public engagement with the new models.
Related
- Sol, Terra, and Luna, our GPT‑5.6 family of models, are starting to roll out now in ChatGPT, Codex, and the API.
- Please welcome GPT-6 Sol and GPT-6 Luna to the GPT-6 universe. GPT-6 Sol and Luna build on the advances behind GPT-6 Astra, bringing much of…
- Astra is our most aligned model, with substantial improvements in understanding user intent.
Source: OpenAI (X) | 2026-09-22