Langchainjs Engineering Benchmarks

LangChain · GitHub · Updated September 11, 2026

Langchainjs delivery benchmarks are based on 36 merged pull requests in the last 30 days (861 all-time), with 3.2 hours median cycle time, 0.1 hours median review time, and 11 active contributors. AI-related signals appear on 8.3% of recent work. PR volume is up 80% compared to the prior period.

Median Cycle Time
3.2h
PR open to merge
Median Review Time
0.1h
first review to approval
AI-Related Signals
8.3%
directional signal across recent PRs
Best Signal Fast Delivery
3.2h
Median cycle time of 3.2h

Repo vs LangChain Average

+0.5pp
AI Signals
+2.5h
Cycle Time
-0.2h
Review Time

Delivery Trend and AI Signals

PR Backlog (Humans)

Excludes AI agents and automation accounts.

PR Backlog (AI Agents)

AI coding agents only.

Cycle Time by AI-Related Signals

12.7h
with signals
18.6h
baseline
-31.8%
difference

PR Breakdown

3 with signals / 40 total PRs

Top AI Tools

chatgpt 4
claude_code 1
claude 1

PR Type Breakdown

unknown 26
bugfix 3
chore 2
feature 2
ci 2
docs 1

Methodology

Metrics are computed from merged pull request data synced daily from GitHub. AI-related metrics are directional signals inferred from pull request activity patterns and heuristics. Summary metrics use a 30-day rolling window; trends use a 90-day window. Last updated 16 minutes ago.

Updated daily from public GitHub pull requests.

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