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Model details

DeepSeek V4 Flash 0731 (free)

DeepSeek V4 Flash 0731 is positioned by its creator as the official release of the DeepSeek V4 Flash line, succeeding an earlier preview and emphasizing agentic workflows rather than general chat alone. Its model architecture mirrors the sibling DeepSeek V4 Flash DSpark variant, shipping with a speculative decoding module that lets a smaller draft model help generate tokens faster while keeping outputs aligned with the main network. The checkpoint is published openly by the deepseek-ai organization on Hugging Face under an MIT license, with the official DeepSeek homepage, chat interface, and a linked arXiv technical report alongside it, giving developers straightforward access to weights, licensing terms, and accompanying documentation.

Performance evidence on the model's own card highlights strong results on agent-style evaluations, including Terminal Bench 2.1, NL2Repo, Cybergym, DeepSWE, and Toolathlon-Verified, where V4 Flash 0731 is reported to outperform the larger DeepSeek V4 Pro Preview despite a smaller activated parameter footprint and to remain broadly competitive with leading proprietary systems. These benchmark signatures point to a model aimed at code generation, repository-level reasoning, multi-step tool use, and autonomous task completion rather than lightweight conversational exchange. Practically, that makes the checkpoint a good fit for teams building coding assistants, agent pipelines, or research environments that need an open-weights model with documented agentic strengths and headroom for speculative-decoding-style speedups.

OpenRouterdeepseek/deepseek-v4-flash-0731:freedeepseek-flash

Historical specifications

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Provider
OpenRouter
Model key
deepseek/deepseek-v4-flash-0731:free
Release date
Jul 31, 2026
Last updated
Jul 31, 2026
Knowledge cutoff
2025-05
Input modalities
Output modalities
Capabilities

Historical cost

{
  "input": 0,
  "output": 0
}

Historical limits

{
  "output": 393216,
  "context": 1048576
}

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