LangSmith
AI Agent & LLM Observability Platform
VS
O
OpenAI Codex
AI coding assistant and agent for accelerated software development workflows.
Detailed comparison
Criteria
LangSmith
OpenAI Codex
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
—
Free trial
No
—
Audience
b2b
B2B
Platforms
Web
—
API
Yes
—
Open Source
Proprietary
—
Integrations
Pagerduty
—
Categories
Dev & Tech, information technology & services, Apps
Dev & Tech, AI & ML, Operations
Popularity
Very High
Low
Description
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
OpenAI Codex is an advanced AI coding assistant designed to streamline software development workflows. It allows developers to manage multiple AI agen...
Pricing
LangSmith
Freemium
OpenAI Codex
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
OpenAI Codex
—
Free trial
LangSmith
No
OpenAI Codex
—
Audience
LangSmith
b2b
OpenAI Codex
B2B
Platforms
LangSmith
Web
OpenAI Codex
—
API
LangSmith
Yes
OpenAI Codex
—
Open Source
LangSmith
Proprietary
OpenAI Codex
—
Integrations
LangSmith
Pagerduty
OpenAI Codex
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
OpenAI Codex
Dev & Tech, AI & ML, Operations
Popularity
LangSmith
Very High
OpenAI Codex
Low
Description
LangSmith
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
OpenAI Codex
OpenAI Codex is an advanced AI coding assistant designed to streamline software development workflows. It allows developers to manage multiple AI agen...
Features
LangSmith
Cost tracking
Online LLM-as-judge and code evals
Tool and agent trajectory monitoring
Webhook and Pagerduty alerts
Message threading for multi-turn chat interactions
Templates for error analysis
OpenAI Codex
Manages multiple AI coding agents across projects with a centralized workspace
Generates, writes, reviews, edits, and debugs code, and answers codebase questions
Automates complex tasks like refactoring, migrations, and creating new features
Offers an auditable workflow in a secure, isolated environment with GitHub integration
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
OpenAI Codex
Other comparisons
FAQ: LangSmith vs OpenAI Codex
LangSmith: AI Agent & LLM Observability Platform. OpenAI Codex: AI coding assistant and agent for accelerated software development workflows.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and OpenAI Codex is freemium.
The best choice between LangSmith and OpenAI Codex depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
LangSmith is primarily designed for individuals, while OpenAI Codex is built for businesses and professionals.
LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts. OpenAI Codex offers: Manages multiple AI coding agents across projects with a centralized workspace, Generates, writes, reviews, edits, and debugs code, and answers codebase questions, Automates complex tasks like refactoring, migrations, and creating new features, Offers an auditable workflow in a secure, isolated environment with GitHub integration.
Based on our data, LangSmith currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.