FrontierAugust 12, 2026via Simon Willison

DeepSeek V4 Pro 0813 (on OpenRouter)

Why it matters

DeepSeek continues iterating on its frontier reasoning model, making it widely available via OpenRouter API. A datapoint on the lab-race velocity and the cost-capability envelope practitioners are evaluating.

Key signals

  • DeepSeek V4 Pro 0813 release
  • Available on OpenRouter API
  • Timing: August 12, 2026
  • Frontier model iteration with focus on reasoning
  • Cost-capability positioning vs. competitors

The hook

DeepSeek ships V4 Pro 0813 on OpenRouter. Early signals on reasoning and cost vs. frontier rivals.

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DeepSeek V4 Pro 0813 (on OpenRouter) | KeyNews.AI