Release date: 2026-09-10. This update is based on the vendor’s announcement and was added to the Worksflow.ai guide on October 11, 2026.
DeepSeek announced V4.1 Flash on September 10, 2026, describing a smaller active-parameter footprint, native visual understanding, and API availability. The same notice explains that some earlier model identifiers are being routed to the newer endpoint during the transition.
What the update means
If you call a legacy model slug, verify what it resolves to now and whether its request and response contract changed. Pin supported identifiers where possible and check the official release note for current migration behavior.
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.