LangChain rebrands Agent Builder to Fleet across pricing tiers
What happened
Between the Mar 16, 2026 and Mar 23, 2026 captures of LangChain's pricing page, Pulse recorded one change: Agent Builder rebranded to Fleet across pricing table [Number of Agent Builder agents renamed to Number of Fleet agents; Agent Builder runs renamed to Fleet runs; pricing unchanged at $0.05/run]. Pulse files it as a packaging change (metric change) with a neutral direction. Pulse's latest capture (Oct 5, 2026) lists Plus at $39.
LangChain's previous recorded change was "LangChain Replaces Community Slack With Forum for Developer Plan" (Week 5, 2026). Before that Pulse recorded "LangChain Broadens Developer Plan to Welcome All Solo Users" (Week 3, 2026) and "LangChain Implements 5x Price Increase for Deployment with New 'Agent Run' Billing Model" (Jan 12, 2026). LangChain has been tracked since 2024-11-17.
In the same window OpenAI, Together AI, Anthropic, Huggingface and Cohere also changed their AI & Machine Learning pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- — · Pricing modelRenamed
Beforeto Fleet across pricing table [Number of Agent Builder agents
AfterNumber of Fleet agents
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| — | Pricing model | to Fleet across pricing table [Number of Agent Builder agents | Number of Fleet agents | Renamed |
Values as written on LangChain's public pricing page in the two captures Pulse compared; where the page states no number, the cells give the wording before and after.
Evidence
The two captures Pulse comparedFull-page captures of LangChain's pricing page (langchain.com) from Mar 16, 2026 and Mar 23, 2026; the change is marked near the top of the page, where "to Fleet across pricing table [Number of Agent Builder agents" becomes "Number of Fleet agents".
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LangChain, the last 90 days
Full history- Jun 1, 2026packagingLangChain launches metered billing at $1.50 per compute unit
- May 19, 2026packagingLangChain launches ephemeral agent sandboxes with usage-based pricing
- Apr 3, 2026packagingLangChain launches LangSmith Fleet for no-code AI agent creation
- Mar 24, 2026packagingLangChain rebrands Agent Builder to Fleet across pricing tiers · this change
- Week 5, 2026packagingLangChain Replaces Community Slack With Forum for Developer Plan
- Week 3, 2026packagingLangChain Broadens Developer Plan to Welcome All Solo Users
- Jan 12, 2026packagingLangChain Implements 5x Price Increase for Deployment with New 'Agent Run' Billing Model
Across AI & Machine Learning in the same window
All AI & Machine Learning changes- OpenAIMar 24OpenAI API triples GPT-5 mini pricing, launches budget nano tier
- Together AIMar 17Together AI Adds Qwen3.5 9B, Drops Five Models in Serverless Lineup Shakeup
- AnthropicMar 16Anthropic API simplifies pricing, removes volume-based tiers
- HuggingfaceFeb 23Huggingface doubles PRO Account storage capacity
- CohereJan 13Cohere Introduces Command R7B Model, Optimizing Speed and Efficiency at Competitive Pricing
Questions about this change
Did LangChain raise prices in March 2026?
No list-price increase was recorded between Mar 16, 2026 and Mar 23, 2026. The change Pulse detected was a packaging change: metric change.
What changed on LangChain's pricing page between Mar 16, 2026 and Mar 23, 2026?
Pricing model: to Fleet across pricing table [Number of Agent Builder agents → Number of Fleet agents, renamed. Pulse compared the captures it took on Mar 16, 2026 and Mar 23, 2026; the before/after table above lists each item as written on the page.
How often does LangChain change its pricing?
Pulse recorded 3 other pricing-page changes for LangChain in the 90 days before this one; the previous change was "LangChain Replaces Community Slack With Forum for Developer Plan" in Week 5, 2026; LangChain has been tracked since 2024-11-17.