LangChain vs OpenAI AgentKit

as AI assistants see them, week of 2026-09-14

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LangChain leads OpenAI AgentKit pretty clearly across AI assistants, with an overall score of 44 versus 21. LangChain gets named in 44 of 71 answers, more than double AgentKit's 23 of 71. Scores by assistant tell a similar story: Gemini rates LangChain at 56 but gives AgentKit a 0, and Perplexity favors LangChain 33 to 15. Head-to-head, LangChain comes out ahead on 13 questions, AgentKit on none, with 7 ties. Both tools go unmentioned for voice AI agents and non-technical founder use cases, but LangChain shows up in every answer for "best platforms for building AI agents" and MCP tool questions.

Head to head

metric	LangChain	OpenAI AgentKit
score	44	21
questions won	18	13

By assistant

LangChain

assistant	score	named in, this week	usual spot, this week
ChatGPT	47	55% of answers	#2.1
Claude	49	80% of answers	#5.2
Gemini	56	83% of answers	#4.3
Perplexity	33	37% of answers	#1.7

OpenAI AgentKit

assistant	score	named in, this week	usual spot, this week
ChatGPT	26	35% of answers	#3.3
Claude	36	60% of answers	#5.5
Gemini	0	0% of answers
Perplexity	15	21% of answers	#3.8

Where they differ

Only LangChain gets named for

What's the best way to give an AI agent memory across sessions?
What's the best self-hosted platform for running AI agents privately?
What's the best no-code tool to build an AI agent?
What's the best platform to build an AI agent that connects to my company's data?
What's the best tool to monitor and debug AI agents in production?

Only OpenAI AgentKit gets named for

nothing exclusive

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