DeepSeek just launched its fourth generation of flagship models with DeepSeek-V4-Pro and DeepSeek-V4-Flash , both targeted at enabling highly efficient million-token context inference.

DeepSeek-V4-Pro is the largest model in the family, with 1.6T total parameters and 49B active parameters. DeepSeek-V4-Flash is a smaller 284B-parameter model with 13B active parameters, designed for higher-speed, higher-efficiency workloads. Both models support up to a 1M-token context window, opening new possibilities for long-context coding, document analysis, retrieval, and agentic AI workflows.

Specification DeepSeek-V4-Pro DeepSeek-V4-Flash

Modality Text Text

Total parameters 1.6T 284B

Active parameters 49B 13B

Context length 1M tokens 1M tokens

Max output length Up to 384K tokens through DeepSeek API docs Up to 384K tokens through DeepSeek API docs

Primary use cases Advanced reasoning, coding, long-context agents High-speed efficiency, chat, routing, summarization

License MIT MIT

Table 1.…