The official changelog says the release fixed GPT-6 Astra visibility in the bundled model picker and made it the default when no model is configured.

The official changelog says the release fixed GPT-6 Astra visibility in the bundled model picker and made it the default when no model is configured. It also refined guidance for asynchronous user questions when the relevant tool exists. This is a developer-tool change, not a new model release. Official changelog