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123 tools · 10 stacks
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AI tools are all over the place. This is the full landscape — 123 tools across 12 categories, mapped and connected. Ready to narrow it down? Build your stack →

Stack Layers
What are you building and how is it defined?
How do you write and ship code?
How does your AI think and act?
Which models and infrastructure power it?
How do you build, observe, and extend it?
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These tools integrates with
OpenAI API
vs
PydanticAI

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 PydanticAI when…

  • •You want type-safe, structured LLM outputs in Python
  • •Pydantic is already central to your Python stack
  • •You need reliable schema validation on LLM responses
Field
OpenAI API
PydanticAI
Category
LLM Infrastructure
Agent Frameworks
Type
SaaS
OSS
Free Tier
✗ No
✓ Yes
Plans
API: Per token
—
Stars
—
⭐ 7,000

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.

PydanticAI

Agent framework from the Pydantic team leveraging Python's type system. Supports structured outputs, dependency injection, and multi-model backends.

OpenAI API Website ↗
PydanticAI Website ↗GitHub ↗

Shared Connections (1)

Anthropic API

Only OpenAI API (20)

CrewAIAutoGenLangChainLlamaIndexMastraPydanticAIsmolagentsAgno

Only PydanticAI (3)

OpenAI APILangSmithLogfire
See full comparison in Explore →