LangGraph vs Gemini

LangGraph has just rolled the whole family to 1.2 stable: core, prebuilt, checkpoint, and the Postgres/SQLite checkpoint backends. The marquee 1.2.0 change is durable error-handler resume across host crashes, plus set_node_defaults() on StateGraph and a v3 stream-transformer infrastructure with a new before_builtins opt-in. Delta channel checkpointing — the more compact, history-aware state model — is now shipping across all checkpoint backends as a beta surface.

The platform is pivoting from 'graph runtime for LLM apps' toward 'durable, recoverable agent runtime,' with crash-tolerant execution and a unified checkpoint storage model as the foundation. The cross-package alpha→stable cadence and the conformance work indicate the team is treating delta channels as the next default rather than an experiment. Studio deploy support in the CLI hints at a managed deployment path being prepared alongside the open-source core.

Expect delta channel APIs to exit beta within one or two releases as the conformance suite stabilizes, and v3 stream transformers to graduate beyond the before_builtins opt-in. A more visible push on hosted Studio deploys is the most likely commercial follow-up.