GPT-6.1 Sol changelog

Every change to GPT-6.1 Sol that Modelpeers has recorded, newest first, each with the source it came from. The record starts Aug 29, 2026.

September 2026

2 products from OpenAI

Default changeSep 29, 2026

Codex CLI 0.159.1 added GPT-6.1 Sol as the default model in the bundled catalog and the Amazon Bedrock Mantle and Runtime catalogs.

After

GPT-6.1 Sol

Who is affected:: Codex CLI users who have not pinned a model.
What to do:: Pin a model in your Codex config if you need the previous default.

2 incidents are listed on the GPT-6.1 Sol page. Get this changelog in a feed reader with the RSS feed.