Next.js + Anthropic API
for AI startups.
Next.js + Anthropic API (Claude) is the modern stack for production AI features. Server actions for streaming, edge for low latency. For AI startups: Prompt caching, structured outputs, eval harness from day one.
This stack, applied to you.
For AI startups, Next.js + Anthropic API is the production-grade default for AI features in web apps. Server actions stream responses; route handlers handle tool use; prompt caching saves 60-90% of input tokens. Eval harness should ship from day one. Most production AI features at AI startups ship on this stack with pgvector for retrieval.
AI startups-specific gotchas
- Always cache long system prompts (60-90% savings)
- Streaming requires careful error handling — wrap in try/catch with fallbacks
- Token counting is essential before each request
- Prompt injection from retrieved content is a real risk
- Eval harness ships before features — never the other way
An AI startup ships a RAG-based legal tool. System prompt is cached (saving $400/month at scale). Eval harness runs on every prompt change. Total inference cost per query: $0.003.
Common AI startups questions.
How do we handle AI cost predictability?
Per-customer rate limits, per-customer budget caps, and aggressive prompt caching.
What about the Vercel AI SDK?
Real complement — handles streaming UX, tool calling, structured outputs across providers.
We've shipped this.
Default for AI features in web apps. If you're a AI startups shipping on this stack, we can save you a quarter.
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