Release date: 2026-09-22. This update is based on the vendor’s announcement and was added to the Worksflow.ai guide on October 11, 2026.
OpenAI’s September 22 release expanded the GPT-6 family with Sol and Luna alongside Astra. The announcement frames the family as different capability and efficiency choices, and says the releases build on methods used for Astra. It also points readers to separate model-specific documentation and pricing.
What the update means
Model names alone do not determine the best choice. Compare the current official model IDs, context and output limits, tool support, and your measured task quality. The name Astra refers to OpenAI’s GPT-6 line, not to a Claude 5.5 model.
What to verify before you update a workflow
- Confirm the exact model or product identifier in the vendor’s live documentation.
- Check whether the announcement describes a general release, preview, or restricted rollout.
- Test the same representative tasks, tool calls, and failure cases used in your current workflow.
- Record the vendor’s source and the date your team checked it.
Official sources
Details and availability can change after publication. Recheck the source before acting on this guide.