Back/LangChain

LangChain

LangChain is a framework designed to simplify and streamline the development of applications using large language models for diverse tasks.

Entry price

$39

Plus · /mo

Plans tracked

no add-ons

Pricing changes

Latest Wk 41 '26

Pricing model

Subscription

Free tier available

Pricing Change History

16 changes

202616 changes

Oct 5, 2026

Packaging

Weekly

LangChain retires LCU billing, moves all usage to $1 Standard Units

LangChain Compute Units ($1.50/LCU) retired; all usage now metered in Standard Units (LSU, $1.00). Metering rates rescaled; Fleet allowances 5/25 LCU became 7/37 LSU; Sandbox 8 LSU.

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Aug 24, 2026

Improvement

Weekly

LangChain: new Tuned Evaluators usage pricing (0.01 LCU/eval run)

Introduced Tuned Evaluators, a new pay-as-you-go evaluation feature priced at 0.01 LCU per Evaluation Run (Perceived Error), in public beta for Plus and Cloud Enterprise plans

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Aug 3, 2026

Packaging

Weekly

LangChain: VC-backed startup discount now discloses $10K credit amount

VC-backed startup discount program now discloses a specific credit amount: up to $10,000 in credits (previously unspecified discounted rates and credits)

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Jul 27, 2026

Improvement

Weekly

LangChain adds Support Portal + Slack support channels

Added two new support channels to the plan comparison table: a self-service Support Portal (all plans) and Slack support

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Jul 21, 2026

Packaging

Weekly

LangChain overhauls LangSmith billing: new LSU, size-based Serverless/Dedicat...

LangSmith added a new LSU unit, moved Deployment to size-based Serverless/Dedicated LCU/LSU metering (from per-run/uptime fees), and switched Fleet to LCU-metered usage with bundled model costs.

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Jun 16, 2026

Improvement

Weekly

LangChain unlocks unlimited Fleet agents for free Developer plan

Developer plan Fleet agent limit increased from 1 to Unlimited, expanding access to Fleet agents for solo users on the free tier.

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Jun 1, 2026

Packaging

Weekly

LangChain launches metered billing at $1.50 per compute unit

LangSmith Engine metered billing introduced at $1.50/LCU (LangChain Compute Unit). Enterprise plan packaging updated from 'Custom Fleet packages' to 'Custom packages for Fleet, Engine, and Sandboxes'.

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May 19, 2026

Packaging

Weekly

LangChain launches ephemeral agent sandboxes with usage-based pricing

LangSmith Sandboxes launched: ephemeral isolated sandboxes for agent-generated code, added to Plus plan with usage pricing (CPU $0.0576/vCPU-hr, Memory $0.0185/GiB-hr, Storage $0.000123/GiB-hr).

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Apr 3, 2026

Packaging

Quarterly

LangChain launches LangSmith Fleet for no-code AI agent creation

Deployment metric row in feature comparison table renamed from 'Agent runs (Deployment)' to 'Deployment runs (Deployment)', reflecting updated terminology for the LangSmith Deployment billing metric. Plus plan seat limit removed - changed from 'Up to 10 seats' to 'Add unlimited seats' at $39/seat/month.

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Mar 24, 2026

Packaging

Weekly

LangChain rebrands Agent Builder to Fleet across pricing tiers

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]

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Apr 7, 2026

Packaging

Weekly

LangChain Replaces Community Slack With Forum for Developer Plan

Developer plan community support channel renamed from 'Community Slack' to 'Community Forum' in the support comparison table.

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Apr 6, 2026

Packaging

Weekly

LangChain Broadens Developer Plan to Welcome All Solo Users

Developer plan tagline updated from 'For solo developers getting started' to 'For solo users getting started', broadening the target audience description.

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Jan 12, 2026

Improvement

Quarterly

LangChain Implements 5x Price Increase for Deployment with New 'Agent Run' Billing Model

Insights (beta) feature added to LangSmith Observability & Evaluation section LangGraph Platform rebranded to LangSmith Deployment across the pricing page

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Jan 12, 2026

Improvement

Quarterly

LangChain Expands Plus Plan with Unlimited Node Executions on LangGraph Platform

LangGraph Platform free Dev deployment node executions increased from '100k nodes/mo' to 'unlimited' for Plus plan

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Jan 12, 2026

Packaging

Quarterly

LangChain Integrates LangGraph Platform Pricing into Main Page, Offering Unified Costs for All Products

LangGraph Platform deployment uptime pricing introduced - Development: $0.0007/min, Production: $0.0036/min LangGraph Platform pricing integrated into main pricing page - previously linked separately as 'Looking for LangGraph Platform pricing?', now shows unified pricing for all LangChain products with specific per-node and per-minute deployment costs

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Jan 12, 2026

Improvement

Quarterly

LangChain Boosts Developer Tier with 10x Increase in Max Ingested Events/Hour, Enhancing Performance and Scalability

Organization Roles (User and Admin) added as a new security control feature Developer tier Max Ingested Events/Hour increased from 25k to 250k (10x increase) when payment method is on file

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