What is DeepSeek V3.1?

DeepSeek V3.1 is cataloged under DeepSeek / DeepSeek with canonical ID deepseek/deepseek-chat-v3.1.

DEDeepSeek/ DeepSeek

DeepSeek V3.1

deepseek/deepseek-chat-v3.1

DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...

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Model information

Released

2025-08-21

Context window

164K

Max output

33K

Weights

Open

Modalities

Input

Text

Output

Text

Identity

Version: deepseek-chat-v3.1
Knowledge cutoff: 2025-03-31

Resources

Hugging Face

Capabilities

Open weightReasoningStructuredTemperatureTool call

Providers

Provider	Provider model ID	Protocol	Context	Max output	Capabilities	Notes	Pricing	Streaming
OpenRouter	deepseek/deepseek-chat-v3.1	openai_chat	164K	33K	ReasoningTool callStructuredTemperature	Hugging Face: deepseek-ai/DeepSeek-V3.1	input $0.25/M · output $0.95/M cache read $0.13/M	Yes
TensorX	deepseek/deepseek-chat-v3.1	openai_chat	164K	33K	ReasoningTool callTemperature	-	input $0.2/M · output $0.8/M cache read $0.05/M · cache write $0.25/M	Yes
Kilo Gateway	deepseek/deepseek-chat-v3.1	openai_chat	164K	33K	ReasoningTool callStructuredTemperature	-	input $0.27/M · output $1/M cache read $0.135/M	Yes
DeepSeek	deepseek-chat-v3.1	custom	164K	33K	-	-	-	Yes