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OpenRouter

DeepSeek V4 Flash (free) API

OpenRouter
About

Build advanced reasoning agents with DeepSeek V4 Flash (free), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support, open weights architecture. Access DeepSeek V4 Flash (free) via the OpenRouter API with up to 384K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsOpen
Temperature
Fixed
Attachment
Not Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
384K

Tokens

Pricing

Standard (per 1M tokens)

Input
Free
Output
Free
Frequently Asked Questions

DeepSeek V4 Flash (free) by OpenRouter costs Free per 1M input tokens and Free per 1M output tokens.

Model Details
ID
deepseek/deepseek-v4-flash:free
Provider
OpenRouter
Family
deepseek-flash
Release Date
Apr 24, 2026
Knowledge Cutoff
May 1, 2025
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1
Documentation