DeepSeek V4

Pricing

• deepseek-v4-pro - peak: $1.32/1M input (cache miss), $0.044/1M input (cache hit), $3.96/1M output; off-peak is half
• deepseek-flash (DeepSeek-V4.1-Flash-1017; the legacy deepseek-v4-flash name routes here) - peak: $0.30/1M input (cache miss), $0.006/1M input (cache hit), $1.20/1M output; off-peak is half
• Peak hours are 01:00-04:00 and 06:00-10:00 UTC, Monday to Friday; all other hours, weekends and Chinese public holidays are off-peak
• Open weights - free to download from Hugging Face under the MIT License

Models

The API serves deepseek-v4-pro and deepseek-flash, now DeepSeek-V4.1-Flash-1017. Both have a 1M context window, up to 384K output, and thinking (the default) or non-thinking modes with low, high, or max effort. Point an OpenAI-format client at https://api.deepseek.com or an Anthropic-format client at https://api.deepseek.com/anthropic and set the model name.

Recent changes

• Oct 17DeepSeek-V4.1-Flash is upgraded to DeepSeek-V4.1-Flash-1017 on the API, web, and app, with the same deepseek-flash model name and pricing.
• Sep 10DeepSeek-V4.1-Flash launches with native vision as deepseek-flash, V4-Flash and V4-Flash-Vision-Exp are retired, API prices drop, and V4-Pro service continues past September 14 with billing unchanged.
• Aug 13DeepSeek-V4-Pro reaches GA, the API adds native Responses API support and low, high, and max effort levels, and peak/off-peak pricing starts on August 16.

Sources: DeepSeek V4 Preview Release, DeepSeek Models & Pricing, DeepSeek API Change Log, DeepSeek-V4.1-Flash announcement, deepseek-ai/DeepSeek-V4-Pro on Hugging Face

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