DeepSeek-V3.1 API, Deployment, Pricing
deepseek-ai/DeepSeek-V3.1
DeepSeek-V3.1 is a hybrid large language model released by DeepSeek AI, featuring significant upgrades over its predecessor. A key innovation is the integration of both a 'Thinking Mode' for deliberative, chain-of-thought reasoning and a 'Non-thinking Mode' for direct responses, which can be switched via the chat template to suit various tasks. The model's capabilities in tool use and agent tasks have been substantially improved through post-training optimization, enabling better support for external search tools and complex multi-step instructions. DeepSeek-V3.1 is post-trained on top of the DeepSeek-V3.1-Base model, which underwent a two-phase long-context extension with a vastly expanded dataset, enhancing its ability to process long documents and codebases. As an open-source model, DeepSeek-V3.1 demonstrates performance comparable to leading closed-source models on various benchmarks, particularly in coding, math, and reasoning, while its Mixture-of-Experts (MoE) architecture maintains a massive parameter count while reducing inference costs
Details
Model Provider
deepseek-ai
Type
text
Sub Type
chat
Size
671B
Publish Time
Aug 25, 2025
Input Price
$
0.27
/ M Tokens
Output Price
$
1.1
/ M Tokens
Context length
164K
Tags
MoE,671B,164K
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