LLM observability and evals
LangSmith
LangChain's platform for tracing, monitoring and evaluating LLM applications and agents, usable with or without the LangChain framework through its Python and TypeScript SDKs. It is a hosted service; self-hosting is an add-on to the Enterprise plan.
- Pricing model
- Free tier and paid plans
- Free tier
- Yes
- Self-hostable
- Yes
- Open source
- No
LangSmith pricing
from $39.00 per seat / month
Checked Nov 8, 2026 on the vendor's pricing page. Not monitored.
Current pricing → (opens in a new tab)LangSmith works with 6 of the LLM providers we track
Each is documented in LangSmith's own docs, shown with its lowest current rate from the prices we track, per 1M input tokens. LangSmith may support providers we don't track, and can reach any OpenAI-compatible endpoint; its documentation (opens in a new tab) has the full list.
| Provider | Live price | Setup docs |
|---|---|---|
 Amazon AWSSetup docs ↗ for Amazon AWS (opens in a new tab) | from $0.018/1M input53 models | Setup docs ↗ for Amazon AWS (opens in a new tab) |
 AnthropicSetup docs ↗ for Anthropic (opens in a new tab) | from $0.100/1M input15 models | Setup docs ↗ for Anthropic (opens in a new tab) |
 DeepSeekVia an OpenAI-compatible endpointSetup docs ↗ for DeepSeek (opens in a new tab) | from $0.300/1M input2 models | Setup docs ↗ for DeepSeek (opens in a new tab) |
 Google CloudSetup docs ↗ for Google Cloud (opens in a new tab) | from $0.037/1M input15 models | Setup docs ↗ for Google Cloud (opens in a new tab) |
 Mistral AISetup docs ↗ for Mistral AI (opens in a new tab) | from $0.100/1M input9 models | Setup docs ↗ for Mistral AI (opens in a new tab) |
 OpenAISetup docs ↗ for OpenAI (opens in a new tab) | from $0.025/1M input22 models | Setup docs ↗ for OpenAI (opens in a new tab) |
