These tools integrates with
OpenAI APIvsLangChain
GPT-4o, o1, and embeddings from OpenAI versus The leading LLM app framework
Compare interactively in Explore →Choose OpenAI API when…
- •You need the broadest ecosystem and most integrations
- •GPT-4 or o-series reasoning models are required
- •Assistants API, fine-tuning, or batch API are needed
Choose LangChain when…
- •You want a broad, flexible LLM orchestration toolkit
- •You need integrations with many tools and data sources
- •You're prototyping or exploring LLM app patterns
Side-by-side comparison
Field
OpenAI API
LangChain
Category
LLM Infrastructure
Pipelines & RAG
Type
Commercial
Open Source
Free Tier
✗ No
✓ Yes
Pricing Plans
API: Per token
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GitHub Stars
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⭐ 93,000
OpenAI API
API access to GPT-4o, o1, and other OpenAI models including embeddings and image generation. The most widely used LLM API in production.
Shared Connections8 tools both integrate with
Only OpenAI API (13)
LangChainMastraPydanticAIsmolagentsAgnoHeliconeMistral APICohere APIGroqTogether AI
Only LangChain (16)
OpenHandsLangGraphSemantic KernelLangSmithQdrantChromaPineconeWeaviatepgvectorRAGAS
Explore the full AI landscape
See how OpenAI API and LangChain fit into the bigger picture — 123 tools, 304 relationships, all mapped.