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OpenRouter

DeepSeek V3.1 API

OpenRouter
About

Build advanced reasoning agents with DeepSeek V3.1, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.21/1M input and $0.79/1M output tokens, native tool calling support, open weights architecture. Access DeepSeek V3.1 via the OpenRouter API with up to 33K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
164K

Tokens

Input Limit
164K

Tokens

Max Output
33K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.21
Output
$0.79

Caching (per 1M tokens)

Read
$0.13
Frequently Asked Questions

DeepSeek V3.1 by OpenRouter costs $0.21 per 1M input tokens and $0.79 per 1M output tokens. Cached reads cost $0.13 per 1M tokens.

Model Details
ID
deepseek/deepseek-chat-v3.1
Provider
OpenRouter
Family
deepseek
Release Date
Aug 21, 2025
Knowledge Cutoff
Mar 31, 2025
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1
Documentation