What is DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 is DeepSeek’s language model for coding, reasoning and agent workflows, released on July 31, 2026 as the official V4 Flash after its preview. It suits a repeatable coding evaluation that needs a fixed revision. OpenRouter lists it as text-only; DeepSeek’s newer V4.1 Flash is a separate model that also accepts images.
Why an explicit model revision can matter
DeepSeek identifies the 0731 release as the official V4 Flash release following its preview. For an integration that already works with this family, the useful question is whether a different revision improves your own cases without breaking expected formatting or tool behavior.
A suggested application is a small code-maintenance queue: supply one issue, the relevant files and a test command, then request a limited patch. Keep difficult historical cases in that queue so that an upgrade is evaluated against real failures rather than only easy examples.
Suggested workflow: compare an upgrade fairly
Choose five resolved issues and preserve the original failing versions. Run this model and the proposed replacement with the same input, tool permissions and completion criteria. Keep prompts and provider settings in the evaluation record.
Check test results, patch scope and any manual repair needed. Count a plausible explanation without a working fix as incomplete. Make the upgrade decision from those outcomes and total task usage, while retaining a known working configuration for rollback.
OpenRouter access and revision selection
The specific OpenRouter identifier is deepseek/deepseek-v4-flash-0731. Hosted requests are paid per token; rates vary by provider and may change. The official model card also links the released weights and deployment instructions for teams considering their own infrastructure.
Use the exact identifier in a repeatable evaluation rather than a latest-family alias. Check endpoint availability before scheduling jobs, and inspect actual usage after a sample run. A stable model name is helpful metadata, but does not freeze the entire serving environment.
When V4.1 Flash is a different fit
OpenRouter lists V4.1 Flash as accepting images as well as text. If the task now requires screenshots or visual documents, evaluate that model as a separate candidate. For text-only maintenance, let your regression cases determine whether changing revisions is worthwhile.
What stands out
- Explicit 0731 model revision
- Text input and output
- Tool calling and structured-output support on OpenRouter
Before you choose
- This endpoint is text-only.
- An explicit revision can still be affected by provider changes.
- Open weights and hosted API access have separate costs and terms.
Go to the source
Sources & further reading
Based on the official documentation below. Features and access can change; check the provider before making a decision.