What is the latest version of LangChain?

The current shipped version of LangChain is LangSmith Cloud, as of November 8, 2026.

How much does LangChain cost?

LangChain starts at $39 per month on its cheapest paid tier, as of November 8, 2026.

What AI model does LangChain use?

LangChain runs primarily on Bring your own key.

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LangChain

Name: LangChain
Price: 39 USD
Author: LangChain

LangChain · #9 most active of 22 in Agents & Automation

Compare →

Open-source orchestration for chains, agents and retrieval, plus hosted tracing.

100

Trust score · Verified

4 data points checked · 2026-11-01

Model stack: VerifiedUsage claim: VerifiedVersion: VerifiedEntry price: VerifiedHow this works →

Current version

LangSmith Cloud

Entry cost

Free tier · from $39/mo

Changes / 30d

The short answers · verified November 8, 2026

What is the latest version of LangChain?: The current shipped version of LangChain is LangSmith Cloud, as of November 8, 2026.
How much does LangChain cost?: LangChain starts at $39 per month on its cheapest paid tier, as of November 8, 2026.
What AI model does LangChain use?: LangChain runs primarily on Bring your own key.

Source: LangChain — changelog.langchain.com · Reusable under CC BY 4.0 — cite Tomorrow

Capabilities

Agent abstractions
LangGraph orchestration
LangSmith tracing
Evaluations
Deployment
Tracing
Monitoring
Evaluation
LLM Gateway
LangSmith Fleet
LangSmith Engine
LangSmith Sandboxes
Prompt Hub
Tracing & Observability
Online & Offline Evals
Dataset Management
LangSmith Deployment
Prompt Hub & Playground
Playground
Sandboxes
LangGraph Deployment
Dataset & Experiments
Monitoring & Alerting
Evaluations & Datasets
Annotation Queue
Deep Agents Framework
Observability
Prompt Hub and Playground
Observability & Evaluation
Fleet
Engine
Deployments
Insights
Evals
No-Code Fleet Agents
Agent Improvement Engine
Monitoring & Insights
Online and offline evals
Dataset collection
Annotation queue
LangSmith LLM Gateway
Agent Deployment
Prompt Playground
Engine (Autonomous Evals)
No-Code Agents Fleet
Fleet Agents
Engine Autonomous Fixes
Tuned Evaluators
No-Code Agents
No-Code Agents (Fleet)
Agent Infrastructure
Fleet (No-code agents)
Engine (Autonomous fix)
Engine (Autononmous Fixes)
Datasets
Dataset Collection
Engine (Autonomous eval)
Datasets & Experiments
Automations
Agent Engine
Fleet (No-Code Agents)
Engine (Automated Evals)
Bulk Data Export
Datasets & experiments
LangChain Standard Units (LSUs)
Bulk data export
Monitoring Insights
Tracing & Monitoring
Evaluation & Evals
Agent Sandbox
No-code agents
Tracing / Observability
Evaluators
Agent Authorization

Pricing

Developer
Solo users, 1 seat maximum. Up to 5k base traces/mo included.
Free
Plus
Teams building agents. Unlimited seats. Up to 10k base traces/mo included, plus pay-as-you-go.
$39
Enterprise
Advanced hosting, security, and support needs. Self-hosted and hybrid options.
Free

Entry price over time

4 of 48 points reconstructed from Internet Archive captures (hollow dots) — dated by capture, not by when we first saw the page. View a capture

4/1/2025 · $011/8/2026 · $39

Geek mode

Models under the hood

Bring your own key
Any
disclosed
Claude Fable 5.1
Anthropic
disclosed
Claude Opus 5.5
Anthropic
disclosed
Claude Sonnet 5.5
Anthropic
disclosed
Gemini 3.7 Flash
Google
disclosed
Gemini 3.8 Flash
Google
disclosed
GPT-5.6 Luna
OpenAI
disclosed
GPT-5.6 Sol
OpenAI
disclosed
GPT-5.6 Terra
OpenAI
disclosed
GPT-6 Luna
OpenAI
inferred
GPT-6.1-Sol
OpenAI
disclosed
LLM Gateway (supports various model providers)
Provider undisclosed
inferred

Context window

Depends on chosen model

Public API

yes

Multi-model routing

Stack signals

langchain
langgraph
langsmith

Shared model stack

Other tracked products running on the same foundation models — a quick read on how much of the catalog moves when one of these models changes.

Claude Opus 5.5+1 aliasAnthropic · 11 products
Claude Fable 5.1+1 aliasAnthropic · 9 products
Claude Sonnet 5.5+1 aliasAnthropic · 9 products
GPT-5.6 LunaOpenAI · 7 products
GPT-5.6 Sol+1 aliasOpenAI · 7 products
GPT-6 Luna+1 aliasOpenAI · 7 products
GPT-6.1 Sol+2 aliasesOpenAI · 7 products
GPT-5.6 TerraOpenAI · 6 products

green disclosed · amber inferred · grey unattributed. Aliases are folded into one model; provider concentration counts only models with an established vendor.

Reported scale

Reference data. Each figure is whatever the source actually said — weekly users, downloads, revenue run-rate — with its own definition and date. These are not comparable between tools and are never used to rank anything.

GitHub stars
143k
stars
Public registry
as of Aug 2026·GitHub repository ·disclosed
Package downloads
70M
downloads / mo
Public registry
Developer-side proxy only.
as of Jun 2025·PyPI + npm download stats ·disclosed

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Model: Bring your own key

Copilot Studio

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Build enterprise agents

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Cost: from $0.01/mo
Model: Anthropic lineup

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Secure agent platform deployable on-prem or in a private VPC.

Version: 2
Cost: Enterprise-ready AI platform. Get in touch for custom enterprise pricing.
Model: Command A

Zapier Agents

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Agents across 8000 apps

Version: Zapier Agents
Cost: Free tier · from $19.99/mo
Model: task management

LangGraph

LangChainUnited States

Stateful agent runtime

Version: Open Source
Cost: Free and open-source under MIT license.
Model: Model-agnostic

UiPath Agentic Automation

UiPathUnited States

RPA meets agents

Version: UiPath Platform
Cost: Free tier · from $25/mo
Model: Autopilot

Elsewhere on the same models

Products in other segments that name one of LangChain's models in their stack.

Windsurf

Cognition

Agentic IDE with flow awareness

Version: 3.12.28
Cost: Free tier · from $20/mo
Model: Claude Fable 5.1

Change history

Nov 8, 2026first seencapability
New capabilities: Agent Authorization
73 tracked74 tracked · +Agent Authorization
source
Nov 2, 2026first seencapability
New capabilities: Evaluators
72 tracked73 tracked · +Evaluators
source
Oct 28, 2026first seenmodel
LangChain added GPT-6 Luna to its model stack
Bring your own key, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, GPT-6.1-Sol, Gemini 3.7 Flash, Gemini 3.8 Flash, LLM Gateway (supports various model providers)Bring your own key, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, GPT-6 Luna, GPT-6.1-Sol, Gemini 3.7 Flash, Gemini 3.8 Flash, LLM Gateway (supports various model providers)
source
Oct 21, 2026first seenversion
LangChain moved to LangSmith Cloud
LangSmithLangSmith Cloud
source
Oct 20, 2026first seenversion
LangChain moved to LangSmith
October 2026 plansLangSmith
source
Oct 20, 2026first seencapability
New capabilities: Tracing / Observability
71 tracked72 tracked · +Tracing / Observability
source
Oct 18, 2026first seenversion
LangChain moved to October 2026 plans
LangSmith Cloud (October 2026 plans)October 2026 plans
source
Oct 16, 2026first seenversion
LangChain moved to October 2026 plans
LangSmith Cloud October 2026 planOctober 2026 plans
source
Oct 16, 2026first seencapability
New capabilities: Agent Sandbox, No-code agents
69 tracked71 tracked · +Agent Sandbox, No-code agents
source
Oct 13, 2026first seencapability
New capabilities: Monitoring Insights
66 tracked67 tracked · +Monitoring Insights
source
Oct 11, 2026first seenversion
LangChain moved to LangSmith Cloud
LangSmith Cloud September 2026 updateLangSmith Cloud
source
Oct 11, 2026first seencapability
New capabilities: Bulk data export
65 tracked66 tracked · +Bulk data export
source
Oct 9, 2026first seenversion
LangChain moved to LangSmith Cloud (September 28-October 5, 2026)
LangSmith CloudLangSmith Cloud (September 28-October 5, 2026)
source
Oct 9, 2026first seenmodel
LangChain added Gemini 3.7 Flash to its model stack
Bring your own key, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, GPT-6.1-Sol, Gemini 3.8 Flash, LLM Gateway (supports various model providers)Bring your own key, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, GPT-6.1-Sol, Gemini 3.7 Flash, Gemini 3.8 Flash, LLM Gateway (supports various model providers)
source
Oct 8, 2026first seenmodel
LangChain added Claude Opus 5.5, Claude Sonnet 5.5, Gemini 3.8 Flash, GPT-6.1-Sol to its model stack
Bring your own key, Claude Fable 5.1, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, LLM Gateway (supports various model providers)Bring your own key, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, GPT-6.1-Sol, Gemini 3.8 Flash, LLM Gateway (supports various model providers)
source
Oct 8, 2026first seencapability
New capabilities: Bulk Data Export
62 tracked63 tracked · +Bulk Data Export
source
Oct 5, 2026first seencapability
New capabilities: Fleet (No-Code Agents), Engine (Automated Evals)
60 tracked62 tracked · +Fleet (No-Code Agents), Engine (Automated Evals)
source
Oct 5, 2026announcedversion
LangChain moved to LangSmith Cloud (October 2026 plans)
October 2026 plansLangSmith Cloud (October 2026 plans)
source
Oct 5, 2026announcedversion
LangChain moved to LangSmith Cloud October 2026 plan
LangSmith CloudLangSmith Cloud October 2026 plan
source
Oct 5, 2026announcedcapability
New capabilities: Tracing & Monitoring, Evaluation & Evals
67 tracked69 tracked · +Tracing & Monitoring, Evaluation & Evals
source
Sep 28, 2026announcedversion
LangChain moved to LangSmith Cloud September 2026 update
LangSmith Cloud (September 28-October 5, 2026)LangSmith Cloud September 2026 update
source
Sep 28, 2026announcedcapability
New capabilities: Datasets & experiments, LangChain Standard Units (LSUs)
63 tracked65 tracked · +Datasets & experiments, LangChain Standard Units (LSUs)
source
Sep 25, 2026first seencapability
New capabilities: Agent Engine
59 tracked60 tracked · +Agent Engine
source
Sep 23, 2026first seencapability
New capabilities: Automations
58 tracked59 tracked · +Automations
source
Sep 20, 2026first seencapability
New capabilities: Datasets & Experiments
57 tracked58 tracked · +Datasets & Experiments
source
Sep 15, 2026first seencapability
New capabilities: Engine (Autonomous eval)
56 tracked57 tracked · +Engine (Autonomous eval)
source
Sep 10, 2026first seenmodel
LangChain added Claude Fable 5.1 to its model stack
Bring your own key, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, LLM Gateway (supports various model providers)Bring your own key, Claude Fable 5.1, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, LLM Gateway (supports various model providers)
source
Sep 7, 2026first seencapability
New capabilities: Dataset Collection
55 tracked56 tracked · +Dataset Collection
source
Sep 3, 2026first seencapability
New capabilities: Datasets
54 tracked55 tracked · +Datasets
source
Sep 2, 2026first seencapability
New capabilities: Engine (Autononmous Fixes)
53 tracked54 tracked · +Engine (Autononmous Fixes)
source
Sep 1, 2026first seencapability
New capabilities: Fleet (No-code agents), Engine (Autonomous fix)
51 tracked53 tracked · +Fleet (No-code agents), Engine (Autonomous fix)
source
Aug 28, 2026first seencapability
New capabilities: Agent Infrastructure
50 tracked51 tracked · +Agent Infrastructure
source
Aug 27, 2026first seencapability
New capabilities: No-Code Agents (Fleet)
49 tracked50 tracked · +No-Code Agents (Fleet)
source
Aug 25, 2026first seencapability
New capabilities: No-Code Agents
48 tracked49 tracked · +No-Code Agents
source
Aug 21, 2026first seencapability
New capabilities: Tuned Evaluators
47 tracked48 tracked · +Tuned Evaluators
source
Aug 20, 2026first seencapability
New capabilities: Fleet Agents, Engine Autonomous Fixes
45 tracked47 tracked · +Fleet Agents, Engine Autonomous Fixes
source
Aug 18, 2026first seenmodel
LangChain added GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra to its model stack
Bring your own key, LLM Gateway (supports various model providers)Bring your own key, GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, LLM Gateway (supports various model providers)
source
Aug 18, 2026first seencapability
New capabilities: No-Code Agents Fleet
44 tracked45 tracked · +No-Code Agents Fleet
source
Aug 17, 2026first seencapability
New capabilities: Engine (Autonomous Evals)
43 tracked44 tracked · +Engine (Autonomous Evals)
source
Aug 16, 2026first seencapability
New capabilities: Agent Deployment, Prompt Playground
41 tracked43 tracked · +Agent Deployment, Prompt Playground
source

Subscribe to LangChain changes

LangChain compared

Straight head-to-head pages against the busiest products in Agents & Automation.

LangChain vs Browser Use LangChain vs Copilot Studio LangChain vs Cohere North LangChain vs Zapier Agents LangChain vs LangGraph LangChain vs UiPath Agentic Automation

How to cite this page

Free to cite and reuse under CC BY 4.0. Permalink: https://tomorrow.aliensquad.ai/tools/langchain

APA

Tomorrow. (2026). LangChain — version, pricing and model stack [Data set entry]. AlienSquad. Retrieved 2026-11-08, from https://tomorrow.aliensquad.ai/tools/langchain

BibTeX

@misc{tomorrow-tools-langchain,
  author       = {{Tomorrow}},
  title        = {LangChain — version, pricing and model stack},
  year         = {2026},
  publisher    = {AlienSquad},
  howpublished = {\url{https://tomorrow.aliensquad.ai/tools/langchain}},
  note         = {Accessed: 2026-11-08}
}