Pick DSPy if
python teams who will write signatures and a metric and already have a model API key.
Read the DSPy pageDSPy vs Pydantic AI
Our take
Pick DSPy if python teams who will write signatures and a metric and already have a model API key. Pick Pydantic AI if python teams who already trust Pydantic and will add Logfire when they want a trace. Skip Pydantic AI if teams that want a hosted AgentOS UI without writing the agent (Agno).
Best for
DSPy A maintainable LM program in a repo
Pydantic AI Write the agent in Python
Free plan
DSPy $0
Pydantic AI $0 · 3 projects. 30-day retention. 1 seat + 2 read-only guests. No card
Lowest paid
DSPy Not published by the vendor
Pydantic AI Team $49/mo
Next step up
DSPy
Pydantic AI Growth $249/mo
Coding agent
DSPy
Pydantic AI Typed agents
Runs where
DSPy Hosted
Pydantic AI Hosted
Watch out
DSPy You bring the model bill
Pydantic AI The $0 library is not a $0 model bill
Last checked
DSPy 2026-10-22 · github.com/stanfordnlp/dspy/blob
Pydantic AI 2026-10-22 · pydantic.dev/pricing
Which one, then?
Pick Pydantic AI if
python teams who already trust Pydantic and will add Logfire when they want a trace.
Read the Pydantic AI page