DeepSeek V4 Pro 0813 (on OpenRouter)

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https://openrouter.ai/deepseek/deepseek-v4-pro-0813">DeepSeek V4 Pro 0813 (on OpenRouter)


The latest DeepSeek Pro model is now available, via API only.

I had to link to OpenRouter because DeepSeek don't have any obvious announcement page for their new model.


I haven't been able to confirm if they plan to release the open weights, but given the weights are available for both April's https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro">deepseek-ai/DeepSeek-V4-Pro and July's https://huggingface.co/deepseek-ai/DeepSeek-V4-Flash-0731">deepseek-ai/DeepSeek-V4-Flash-0731 it seems likely.


Interestingly I got https://tools.simonwillison.net/markdown-svg-renderer#url=https%3A%2F%2Fgist.github.com%2Fsimonw%2Fc1108a380593547c2def5863bca63160">very different looking pelicans for the three different reasoning levels of low, medium, and high.

I've not noticed this kind of difference from any other model:


Low:


Flat vector illustration of a white pelican with a large orange beak, wearing a straw hat with an orange band, riding a teal road bicycle in profile, set against a pale cream circle with a dashed outline and small motion marks trailing behind.https://static.simonwillison.net/static/2026/deepseek-pro-low.png" />


Medium:


A similar cartoon pelican cycling, drawn in a looser outlined style: the bird's body is mostly white line art, its orange beak pouch hangs open under a yellow cap, a long red tongue streams backwards towards a yellow sun, and a small blue fish sits on a tray by the handlebars of a green bicycle whose wheels are drawn as broken yellow arcs.https://static.simonwillison.net/static/2026/deepseek-pro-medium.png" />


High:


The pelican again, this time on a red bicycle against a pale blue background, with a bright yellow beak and pouch, a purple pennant flag on the back, a wicker front basket holding a small fish, and black musical notes floating in the top right corner.https://static.simonwillison.net/static/2026/deepseek-pro-high.png" />


In terms of benchmarks... as far as I can tell those were released to the Official DeepSeek WeChat Group, then copied and pasted into https://www.reddit.com/r/LocalLLaMA/comments/1vmi0fg/removed_by_moderator/">a post on Reddit which was deleted by the moderators for being "low-effort", then copied into https://news.ycombinator.com/item?id=49274600#49275180">this ASCII-art table on Hacker News.


Tags: https://simonwillison.net/tags/ai">ai, https://simonwillison.net/tags/generative-ai">generative-ai, https://simonwillison.net/tags/llms">llms, https://simonwillison.net/tags/pelican-riding-a-bicycle">pelican-riding-a-bicycle, https://simonwillison.net/tags/deepseek">deepseek, https://simonwillison.net/tags/llm-release">llm-release, https://simonwillison.net/tags/ai-in-china">ai-in-china

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