Model family timeline
Last updated Sep 22, 2025
DeepSeek V3.1 model releases
A source-backed timeline for the DeepSeek V3.1 model family, collecting release dates, labs, access details, context windows, and major lifecycle changes.
2
Models
1
Labs
2
Open
2
Recent
Most recent in this set
2 models
DeepSeek-V3.1-Terminus
AvailableDeepSeekOpen source
Stability update to V3.1 focused on language consistency, code-agent reliability, and search-agent behavior.
Type
MoE
Params
685B
Context
128K
Top eval
—
Released
Sep 22, 2025
9mo ago
MoE685B128K ctxSep 22, 2025
DeepSeek-V3.1
AvailableDeepSeekOpen source
Hybrid thinking/non-thinking release that upgraded tool calling, long-context training, and agent task performance.
Type
MoE
Params
671B
Context
128K
Top eval
—
Released
Aug 21, 2025
10mo ago
MoE671B128K ctxAug 21, 2025