DeepSeek V4 Pro 0813 (on OpenRouter)
DeepSeek V4 Pro 0813 is now available, accessible via API on OpenRouter. Simon Willison reports that DeepSeek has not published an official announcement page for this model, so he linked to OpenRouter instead. He notes that while he could not confirm plans for open-weight release, it seems likely given that both April's deepseek-ai/DeepSeek-V4-Pro and July's deepseek-ai/DeepSeek-V4-Flash-0731 have open weights. Willison observed that the model produced very different pelican images across its three reasoning levels (low, medium, high), a difference he has not seen from other models. Benchmark details were initially shared in the Official DeepSeek WeChat Group, then copied to a Reddit post that moderators deleted for being 'low-effort', and finally reposted as an ASCII-art table on Hacker News. The model is API-only, and no pricing or performance specifics are mentioned in the source.
DeepSeek V4 Pro 0813 is available via API, with potential open weights, offering developers a new model option.