LangGraph 1.2.18 released
A patch release that improves error handling, checkpointing behavior, and snapshot frequency for long-running threads.
What changed in 1.2.18
- Error handlers now recover on every execution path and stream results from failed tasks.
- DeltaChannel takes full snapshots every 100 updates instead of 1000 for faster reads on long threads.
- The last checkpoint is now streamed when a run stops due to interrupt_after or recursion limit.
- Tag duplication at subgraph levels has been removed.
Check before you update
- DeltaChannel snapshot_frequency default changed from 1000 to 100 updates; pass snapshot_frequency=1000 to restore previous behavior.
Summarised by AgentGid from LangChain's official release notes on GitHub, as reported there; read the original before relying on it. Price, status and release dates come from our daily data.
LangGraph at a glance
| What it is | A low-level orchestration framework for building stateful agents as graphs, with durable execution, persistence and human-in-the-loop steps. Available for Python and JavaScript. |
|---|---|
| Latest version | 1.2.22, Nov 14, 2026. This page is about an earlier release. |
| Release pace | 7 stable releases in the last 30 days; 1.2.18 came 2 days after the previous one |
| Price | Free (OSS). LangGraph is open source and free to use; you pay only for the models and infrastructure it runs on. (checked Nov 5, 2026) |
| Downloads, last 7 days | 19M up 1.7% |
| Gid Score | 74 #2 in Agent frameworks and SDKs |
