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