DeepSeek V4 Pro (free lane) is a balanced model from DeepSeek, available here under the exact model id “deepseek-v4-pro:free”. It heads the DeepSeek line-up here, above DeepSeek V4 Pro, DeepSeek V4 Flash (free lane) and DeepSeek V4 Flash. DeepSeek has not published a release date we can cite; it has been available here since 11 Nov 2026.
DeepSeek documents tools, reasoning and json mode for it.
It costs $0.49 per million input tokens and $0.98 per million output tokens, so output is 2× the input rate. On the use cases below, output makes up 11% of the bill for coding agents, 83% for hard reasoning and 92% for math, so capping max tokens and asking for diffs saves more than trimming the prompt. With a 3:1 input-to-output mix it ranks 10th lowest-cost of the 27 models on this site.
There is no discounted cached-input rate for this model, so every input token bills at $0.49 per million.
It is served through the OpenAI-compatible format at https://api.oneaiapikey.com/v1, so any SDK or tool that lets you set a custom base URL, for example Codex CLI, Cursor and Cline, can use it. It is not offered on the Anthropic Messages endpoint; pick an Anthropic-format model for Claude Code.