# LangSmith: how AI models rank it, November 2026

Gane Index, November 2026 Edition. Named in 10 judge labels across 2 categories by 9 of 14 models. Page: https://www.gane.ai/index/it/vendors/langsmith

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| [LLM gateways and observability](https://www.gane.ai/index/it/it-data/llm-gateways-and-observability/index.md) | 2% | 8 | 0% | 9 |
| [AI governance platforms](https://www.gane.ai/index/it/it-data/ai-governance-platforms/index.md) | 0% | 117 | 0% | 1 |

## What the models said for it

- "I'd usually recommend LangSmith + LiteLLM as the default combo" (GPT-5.4 mini, LLM gateways)
- "Best if your stack is heavily LangChain/LangGraph-based... can get pricey at scale." (Grok 4.20, LLM gateways)
- "choose it primarily for applications built around LangChain or LangGraph" (Perplexity Sonar, LLM gateways)
- "LangSmith — Best if You're Deep in the LangChain Ecosystem" (DeepSeek V4 Flash, LLM gateways)

## By model

| Model | First choice | Alternative | Mention | Warning | Labels |
|---|---|---|---|---|---|
| Claude Haiku 4.5 | 0 | 0 | 0 | 0 | 0 |
| GPT-5.4 mini | 1 | 0 | 0 | 0 | 1 |
| Gemini 3.5 Flash | 0 | 0 | 0 | 0 | 0 |
| Perplexity Sonar | 0 | 1 | 0 | 0 | 1 |
| Grok 4.20 | 0 | 1 | 1 | 0 | 2 |
| Mistral Small | 0 | 0 | 1 | 0 | 1 |
| DeepSeek V4 Flash | 0 | 1 | 0 | 0 | 1 |
| Llama 4 Maverick | 0 | 0 | 1 | 0 | 1 |
| Qwen 3.7 Flash | 0 | 0 | 0 | 0 | 0 |
| Kimi K2 | 0 | 0 | 0 | 0 | 0 |
| GLM 4.7 FlashX | 0 | 1 | 0 | 0 | 1 |
| MiniMax M2.5 | 0 | 1 | 0 | 0 | 1 |
| GPT-6 Luna | 0 | 0 | 0 | 0 | 0 |
| Muse Glimmer 30B | 0 | 0 | 1 | 0 | 1 |

## Sources returned with these answers

The sites and pages cited by the answers that named LangSmith, from 19 of the 24 answers that named it (only the models that return a source list).

### Domains cited

- getmaxim.ai: 9
- github.com: 7
- confident-ai.com: 6
- langchain.com: 6 (its own site)
- braintrust.dev: 5
- orq.ai: 5
- respan.ai: 5
- dev.to: 4
- langfuse.com: 4
- arize.com: 3

### Pages cited

- https://getmaxim.ai/articles/top-5-llm-observability-tools-for-enterprises-in-2026.md: 5
- https://langchain.com/resources/llm-observability-tools: 5
- https://orq.ai/blog/best-llm-observability-tools: 5
- https://braintrust.dev/articles/best-llm-gateways-observability-2026: 4
- https://confident-ai.com/knowledge-base/compare/best-enterprise-llm-observability-tools: 3
- https://getmaxim.ai/articles/top-5-llm-observability-platforms-for-enterprises-in-2026: 3
- https://respan.ai/articles/best-llm-observability-tools: 3
- https://roadmap.sh/ai-engineer/observability-tools: 3

## In its own words

What LangSmith's own pages state, read 2026-09-28. Stated by the vendor, not checked by the index.

- Positioning: the agent engineering platform (https://langchain.com/)
- For: companies (https://langchain.com/)
- Price stated: Developer: $0 / seat per month then pay as you go; Plus: $39 / seat per month then pay as you go; Enterprise: Custom pricing then pay as you go (https://www.langchain.com/pricing)
- Starting price: $0 / seat per month (https://www.langchain.com/pricing)
- Free plan or trial: Developer plan; Start for free (https://www.langchain.com/pricing)
- Hosting: US or EU
- Customers named: Klarna, Monday Service, Podium, C.H. Robinson, ServiceNow, NVIDIA, Morningstar, Cisco

## What it publishes

Every page langchain.com exposes, read 2026-09-29: 2287 addresses. By kind, pages and the last 90 days:

- blog: 559 pages, 138 in the last 90 days, latest 2026-09-28
- case study: 14 pages, 0 in the last 90 days, latest undated
- webinar or virtual event: 17 pages, 6 in the last 90 days, latest 2026-09-22
- conference or event: 12 pages, 1 in the last 90 days, latest 2026-08-26
- report or ebook: 2 pages, 0 in the last 90 days, latest undated
- comparison: 12 pages, 2 in the last 90 days, latest 2026-09-10
- template or tool: 14 pages, 0 in the last 90 days, latest 2026-03-27
- glossary or explainer: 33 pages, 3 in the last 90 days, latest 2026-09-07
- podcast or video: 2 pages, 0 in the last 90 days, latest 2026-06-25
- Recent: 2026-09-28 blog: LangSmith Custom Apps: Build custom interfaces around your agent data https://www.langchain.com/blog/langsmith-custom-apps
- Recent: 2026-09-28 blog: Building prod with jev and langgraph https://www.langchain.com/blog/building-prod-with-jev-and-langgraph
- Recent: 2026-09-28 blog: Langsmith engine agents fine tuning trajectories https://www.langchain.com/blog/langsmith-engine-agents-fine-tuning-trajectories
- Recent: 2026-09-24 blog: New in LangSmith Engine: red teaming and automated testing https://www.langchain.com/blog/langsmith-engine-v2-redteam
- Recent: 2026-09-24 blog: Introducing LangSmith Fine-Tuning https://www.langchain.com/blog/langsmith-fine-tuning
- Recent: 2026-09-24 blog: Managed Deep Agents delivers a better user experience for agents in production https://www.langchain.com/blog/langsmith-managed-deep-agents-whats-new

## Record

- Method: https://www.gane.ai/index/it/methodology
- License: CC BY 4.0. Cite as Gane Index, November 2026 Edition, www.gane.ai/index/it.