DeepSeek-V4-Flash (retired)

Q: What happens to requests to deepseek-v4-flash now?

The name deepseek-v4-flash is temporarily routed to DeepSeek-V4.1-Flash.

DeepSeek-V4-Flash was a DeepSeek API model released in public beta on July 31, 2026, and retired on September 10, 2026.

Lab: DeepSeek
Release date: July 31, 2026
Status: Retired
API model ID: deepseek-v4-flash
Shutdown date: September 10, 2026

On July 31, 2026, DeepSeek released the official DeepSeek-V4-Flash API in public beta (DeepSeek-V4-Flash-0731), a re-post-trained version of DeepSeek-V4-Flash-Preview with the same architecture and size. DeepSeek said it natively supports the Responses API format and is adapted for Codex; the update covered only the V4-Flash API.

DeepSeek retired V4 Flash on September 10, 2026, and the name deepseek-v4-flash is temporarily routed to DeepSeek-V4.1-Flash.

Availability: DeepSeek API (public beta). Name now temporarily routed to DeepSeek-V4.1-Flash.
Official source: api-docs.deepseek.com
Last checked: October 5, 2026

Questions

When was DeepSeek-V4-Flash retired?

DeepSeek retired V4 Flash on September 10, 2026.

What happens to requests to deepseek-v4-flash now?

The name deepseek-v4-flash is temporarily routed to DeepSeek-V4.1-Flash.

How did DeepSeek-V4-Flash differ from the preview?

It was a re-post-trained version of DeepSeek-V4-Flash-Preview with the same architecture and size.

Does DeepSeek-V4-Flash support the Responses API?

DeepSeek said it natively supports the Responses API format and is adapted for Codex.

Source

Release dates, model IDs and limits come from each lab’s own announcement, changelog, documentation or deprecations page, linked on every model with the date it was last checked. How we pick and check sources: editorial standards.