GPT-6 Codename 'Sol' Spotted in OpenAI API

A Reddit user spotted a 'GPT-6 Sol' entry in the OpenAI API with screenshots, suggesting the next-gen model may be in testing and could launch around DevDay, though unconfirmed.

2026-09-11 ~ 2026-09-11 · 2 related posts

• GPT-6 "Sol" reference spotted online, release rumored ahead of DevDay — koltregaskes · 2026-09-11
• GPT-6 Sol Spotted on the OpenAI API, Screenshot Suggests Internal Testing — 141_1337 · 2026-09-11