DeepSeek V4 is now available on Vercel AI Gateway with 1M token context window default across both variants: DeepSeek V4 Pro and DeepSeek V4 Flash.
DeepSeek V4 Pro focuses on agentic coding, formal mathematical reasoning, and long-horizon workflows, handling feature development, bug fixing, and refactoring across stacks with tool use for MCP workflows and agent frameworks. DeepSeek V4 Flash performs close to V4 Pro on reasoning with smaller parameters for faster responses and lower API cost, ideal for high-volume and latency-sensitive workloads.
Use model deepseek/deepseek-v4-pro or deepseek/deepseek-v4-flash in the AI SDK.
Fetched April 28, 2026