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DeepSeekOpen-weight·33K context·671B params·DeepSeek License

DeepSeek V3.1deepseek/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...

Pricing across providers

No current verified API pricing is listed. See the official model documentation for availability and billing.

Capabilities

  • chat
  • reasoning
  • code
  • math
  • tool_use

Languages: en, zh

Technical specs

Context
33K
Max output
7K
Parameters
671B
Release
—
Training cutoff
—
License
DeepSeek License
Hugging Face →Official documentation →

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Frequently asked

How much does DeepSeek V3.1 cost?+
No current verified API pricing is listed. This does not mean the model is free or that a hosted API is currently available. Check the official model documentation below.
How do I access DeepSeek V3.1 from outside China?+
Availability, account verification and payment methods vary by provider and region. Check the official documentation and the selected provider's access requirements before integrating. A directory listing does not guarantee global API access.
Is DeepSeek V3.1 open-source? Can I fine-tune it?+
DeepSeek V3.1 has published weights. License: DeepSeek License. Review the linked repository and license for deployment, fine-tuning and commercial-use conditions.
What's the maximum context window for DeepSeek V3.1?+
The model supports up to 32,768 tokens of context (input + output). Some hosted versions may impose a smaller limit — check the "Context" column in the pricing matrix for each provider.