DeepSeek V4 is available on Vercel AI Gateway in two variants: V4 Pro and V4 Flash. Both ship with a 1 million token context window by default.
V4 Pro targets agentic coding, formal mathematical reasoning, and long-horizon workflows, with native support for MCP and agent framework tooling. V4 Flash runs smaller parameters for faster responses and lower API cost, holding near-Pro performance on reasoning and light agent tasks. Access either via the AI SDK using model identifiers deepseek/deepseek-v4-pro or deepseek/deepseek-v4-flash.
The real story here is the infrastructure layer. Vercel AI Gateway adds provider failover, intelligent routing, automatic retries, observability, and Bring Your Own Key support on top of the model call. The leaderboard and parameter tradeoffs between Pro and Flash are worth examining before you commit to a deployment architecture.
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