DeepSeek V4 is now available on .Vercel AI Gateway There are 2 model variants: DeepSeek V4 Pro and DeepSeek V4 Flash. A 1M token context window is the default across both models. DeepSeek V4 Pro focuses on agentic coding, formal mathematical reasoning, and long-horizon workflows. It handles feature development, bug fixing, and refactoring across stacks, with tool use that works across harnesses like MCP workflows and agent frameworks. It also writes clear, well-structured long-form documents. DeepSeek V4 Flash performs close to V4 Pro on reasoning and holds up on simpler agent tasks, with a smaller parameter size for faster responses and lower API cost.

It's a good fit for high-volume workloads and latency-sensitive use cases. To use DeepSeek V4, set model to or in the .deepseek/deepseek-v4-prodeepseek/deepseek-v4-flashAI SDK AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in , , support, and intelligent provider routing with automatic retries.custom reportingobservabilityBring Your Own Key Learn more about , view the or try it in our…