CATEGORY
AI LLM & AI Platforms tools (6)
Every AI LLM & AI Platforms tool we track on Unifai — 6 tools with verified sample outputs, pricing, and capabilities side by side.
Anthropic API
api
API access to Claude models with prompt caching, extended thinking, tool use, computer use, files, and the Agent SDK for production agents.
LangChain
freemium
Open-source framework for building LLM applications with chains, agents, and tools. Python and JavaScript libraries plus LangSmith observability.
LlamaIndex
freemium
Data framework for LLM applications focused on RAG — connectors, indexing, query engines, and agents over private data.
OpenAI API
api
Programmatic access to GPT-5, o1 reasoning, embeddings, image and audio models with Responses API, function calling, and structured outputs.
OpenRouter
api
Unified API for 400+ AI models from OpenAI, Anthropic, Google, Meta, and others. Automatic fallback, load balancing, and per-token pricing.
Vercel AI SDK
free
TypeScript toolkit for building AI-powered apps. Streaming, tool calls, structured output, and provider-agnostic interfaces for any LLM.