China’s DeepSeek Upgrades V4 Pro: Claude Fable Is Only 5% Better at 4,500% the Price

In brief

• DeepSeek quietly swapped deepseek-v4-pro to the 0813 build, the general-availability release of a model that had been running as a preview since April.
• Across nine agent benchmarks where both models are scored, DeepSeek’s table puts Claude Fable 5 ahead by an average of 5.3%. On two of them, DeepSeek wins.
• Fable 5 costs $10 per million input tokens and $50 per million output. V4 Pro costs $0.435 and $0.87.

DeepSeek shipped the finished version of its flagship on Wednesday with no blog post and no announcement. The tell was a table cell: the model version listed for “deepseek-v4-pro” on the API pricing page now reads DeepSeek-V4-Pro-0813.

The cost to use this model is around $0.435 and $0.87 per million tokens (the basic unit of information a model can handle) of input and output. So the pricing structure remains the same, but what changed is the weights underneath.

Deepseek V4 Pro has been in the wild since April, priced 98% below GPT-5 Pro, and every independent lab that tested it was testing a preview. DeepSeek said so itself on July 31, when it pushed V4-Flash to general availability and noted that the Pro API was “unchanged” with the official release to “follow soon.” The model card on Hugging Face, the go-to repository for open-source AI projects, still describes the V4 series as “a preview version.”