OpenAI AgentKit vs Pydantic AI

as AI assistants see them, week of 2026-10-19

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OpenAI AgentKit edges out Pydantic AI overall, scoring 21 versus 15, and shows up more often too — 23 of 71 answers compared to 19 of 71. Head-to-head, AgentKit is named more often in 5 questions, Pydantic AI in 3, with 12 ties. Both are unanimous picks for "Which AI agent framework should a developer choose?" (3 of 3 each), and Pydantic AI also sweeps "best open-source AI agent frameworks" (3 of 3). By assistant, Claude rates Pydantic AI highest at 41, while AgentKit peaks with Claude too, at 36. Both score 0 with Gemini and go unnamed for voice agents, non-technical founders, and production monitoring.

Head to head

metric	OpenAI AgentKit	Pydantic AI
score	25	17
questions won	16	17

By assistant

OpenAI AgentKit

assistant	score	named in, this week	usual spot, this week
ChatGPT	27	35% of answers	#3.0
Claude	33	40% of answers	#3.6
Gemini	not sampled this week
Perplexity	24	50% of answers	#4.9

Pydantic AI

assistant	score	named in, this week	usual spot, this week
ChatGPT	7	10% of answers	#4.5
Claude	42	70% of answers	#5.1
Gemini	not sampled this week
Perplexity	7	11% of answers	#5.5

Where they differ

Only OpenAI AgentKit gets named for

What are the best alternatives to Pydantic AI?
What's the most reliable platform to run AI agents in production?

Only Pydantic AI gets named for

What's the best tool to automate a business workflow with AI agents?
What are the best alternatives to OpenAI AgentKit?
What's the best self-hosted platform for running AI agents privately?

More comparisons

Not sold on either?

Scores count how often each assistant names a product, weighted by position. How the score works · Full AI agent builders leaderboard