Developer preview
DeepSeek Harness ↗
An agent harness in developer preview, with an official guide linked from the API docs.
Official product / docs →DeepSeek · model APIs and agent infrastructure
DeepSeek V4.1 · Harness
SOURCE CHECK
DeepSeek’s current API catalog distinguishes the Flash serving alias from its underlying model version. Its agent offering includes a developer-preview harness and search/fetch APIs, rather than a single all-purpose agent app.
Latest briefings
Latest models & families
As listed on 2026-10-23Selected current official listings; specialized models and access stages are identified separately.
| Model / family | Positioning & use |
|---|---|
| DeepSeek-V4.1-Flash-1017 ↗API version | The current model behind the deepseek-flash API alias. |
| DeepSeek-V4-Pro-0813 ↗API version | The current Pro version listed under the deepseek-v4-pro identifier. |
Agent tools & products
API tools
Search & Fetch API ↗
Search and page-fetch tools to connect agent workflows to web information.
Official product / docs →Where to start
For an integration, verify both the stable API alias and the model version it currently serves. Third-party coding tools can use DeepSeek as a backend; that does not make those tools DeepSeek products.
Official sources
Checked 2026-10-23 · Original introductions based on vendor documentation, not hands-on reviews.
- DeepSeek-V4.1-Flash-1017 ↗api-docs.deepseek.com
- DeepSeek Harness ↗deepseek-harness.github.io
- Search & Fetch API ↗api-docs.deepseek.com
- Current API versions and agent integrations ↗api-docs.deepseek.com
Availability and product terms can change. Current means checked on the date above, not a live feed or a claim to list every model.