DeepSeek: DeepSeek V4 Flash

deepseek/deepseek-v4-flash

Released Apr 24, 20261,048,576 context$0.14/M input tokens$0.28/M output tokens

DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and high-throughput workloads, while maintaining strong reasoning and coding performance.

The model includes hybrid attention for efficient long-context processing and supports configurable reasoning modes. It is well suited for applications such as coding assistants, chat systems, and agent workflows where responsiveness and cost efficiency are important.

Providers for DeepSeek V4 Flash

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for DeepSeek V4 Flash

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Effective Pricing for DeepSeek V4 Flash

Actual cost per million tokens across providers over the past hour

Apps using DeepSeek V4 Flash

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Recent activity on DeepSeek V4 Flash

Total usage per day on OpenRouter

Prompt

5.87B

Completion

121M

Reasoning

108M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for DeepSeek V4 Flash

Uptime stats for DeepSeek V4 Flash across all providers

Sample code and API for DeepSeek V4 Flash

OpenRouter normalizes requests and responses across providers for you.

OpenRouter supports reasoning-enabled models that can show their step-by-step thinking process. Use the reasoning parameter in your request to enable reasoning, and access the reasoning_details array in the response to see the model's internal reasoning before the final answer. When continuing a conversation, preserve the complete reasoning_details when passing messages back to the model so it can continue reasoning from where it left off. Learn more about reasoning tokens.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.