Deepseek has moved its flagship product out of the testing phase, released its proprietary agent software as open source, and announced higher API prices at the same time.
The deepseek-v4-pro endpoint now delivers build V4-Pro-0813. The model name, parameter count, and one-million-token context window remain unchanged, and Deepseek says existing integrations will keep running without any tweaks. In the app and on the web, the model is available under "Expert Mode." A new addition is native support for the OpenAI Responses API with Codex integration. Reasoning effort can be set to three levels: "low," "high," and "max," with Deepseek recommending the middle setting for everyday agent use.
According to Deepseek's own comparison table, Terminal Bench 2.1 scores jumped from 72.1 to 87.9, and DeepSWE scores went from 12.8 to 62.7. On several agent benchmarks, the model beat Claude Opus 4.8.
The new build shows big gains over the preview version but only beats Kimi K3 and Fable 5 in individual categories. | Image: Deepseek
Artificial Analysis backs up the improvement but also puts it in context. V4-Pro climbs from 45 to 53 on the Intelligence Index, tying GLM-5.2. That's still behind Muse Spark at 57, Qwen 3.8 Max at 58, and Kimi K3 at 60. Claude Opus 5 sits at the top with 63 points. Deepseek hasn't published the weights for the new build yet, and the April preview version is still up on Hugging Face.
