When was DeepSeek-V3.1 released?

On August 21, 2025, from a primary source (api-docs.deepseek.com) (status valid, confidence 0.95).

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DeepSeek-V3.1 release date

As of November 4, 2026, the AsOf record says DeepSeek-V3.1 was released on August 21, 2025, from a primary source (api-docs.deepseek.com); it also holds September 22, 2025 (as DeepSeek-V3.1-Terminus). The record holds 2 claims on DeepSeek-V3.1's release, 2 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

release date: DeepSeek-V3.12025-08-21 · 1 source
release date: DeepSeek-V3.1-Terminus2025-09-22 · 1 source

Every dated value

2 claims · oldest first · superseded claims stay visible

value	valid from	valid to	status	conf	sources	claim
DeepSeek-V3.1 to present · conf 0.95 · 1 src for release date DeepSeek-V3.1	2025-08-21	present	valid	0.95	1 source for release date DeepSeek-V3.1	clm_793845673CEF
DeepSeek-V3.1-Terminus to present · conf 0.95 · 1 src for release date DeepSeek-V3.1-Terminus	2025-09-22	present	valid	0.95	1 source for release date DeepSeek-V3.1-Terminus	clm_D73F82BE9033

Questions this record answers

When was DeepSeek-V3.1 released?: On August 21, 2025, from a primary source (api-docs.deepseek.com) (status valid, confidence 0.95).

Answered from the rows above only, as of November 4, 2026. The record has no opinions.

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