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Add an LLM to your app

“I want my app to call a model — chat, summarise, extract.”

Model APIs and routers. Start with one provider; add a router when you need fallbacks or price shopping.

Tools for this

#1 · Our pick

Best for: Coding and agentic apps

Anthropic's models by API, strong at coding, long documents and tool use. Prompt caching cuts repeat costs.

Best for: Broadest multimodal menu

GPT models plus image, speech and realtime voice APIs under one key.

Best for: Long context on a budget

Google's models with very long context and a free tier that's good for experimenting.

Best for: Apps that read X

Grok models by API, with live access to X data — useful for apps that track what people are saying.

Best for: Many models, one key

One API key for hundreds of models, with automatic fallbacks. Handy for comparing models on price.

Best for: Speed

Very fast inference for open-weight models. Pick it when latency matters more than the model.

Best for: AI features in TypeScript apps

A TypeScript toolkit for streaming chat UIs and tool calls across providers. Natural fit for Next.js apps.

2026-10-07 Claude Haiku 5.5 Anthropic — Anthropic's newest small, fast model — a cheap default for adding AI to an app. source