Vertex AI Agent Engine Agent Runtime
Legacy names Vertex AI Agent Engine, LangChain on Vertex AI, Reasoning Engine, Vertex AI Agent Engine Sessions, Agent Engine Sessions, Vertex AI Agent Engine Memory Bank, Agent Engine Memory Bank, Vertex AI Agent Engine Code Execution, Agent Engine Code Execution
Managed runtime for deploying and hosting agentic frameworks (ADK, LangGraph, CrewAI) with managed sessions, memory bank, and code execution.
Naming timeline
- LangChain on Vertex AI / Reasoning Engine
Initial managed runtime in Preview for deploying reasoning/agentic workflows (reasoningEngines resource).
- Vertex AI Agent Engine
Renamed from LangChain on Vertex AI / Reasoning Engine to Vertex AI Agent Engine at GA (announced 2025-02-27, GA and billing effective 2025-03-04), adding Agent Engine Sessions, Memory Bank, and Code Execution.
- Agent RuntimeCurrent name
Rebranded to Agent Runtime (Agent Runtime on Gemini Enterprise Agent Platform), with sub-features renamed to Agent Platform Sessions, Agent Platform Memory Bank, and Agent Platform Code Execution.
What is Vertex AI Agent Engine called now?
Vertex AI Agent Engine is now called Agent Runtime, with the latest change in October 2025 (Release Notes Table Apr 22, 2026). Earlier names covered by this entry also include LangChain on Vertex AI, Reasoning Engine, Vertex AI Agent Engine Sessions, Agent Engine Sessions, Vertex AI Agent Engine Memory Bank, Agent Engine Memory Bank, Vertex AI Agent Engine Code Execution, Agent Engine Code Execution. Managed runtime for deploying and hosting agentic frameworks (ADK, LangGraph, CrewAI) with managed sessions, memory bank, and code execution. Only the customer-facing name changed; the underlying technical identifiers remain backward compatible.
Also known as
- Agent Runtime on Gemini Enterprise Agent Platform
- Agent Platform Runtime
- Agent Platform Sessions
- Gemini Enterprise Agent Platform Sessions
- Agent Platform Memory Bank
- Gemini Enterprise Agent Platform Memory Bank
- Agent Platform Code Execution
- Gemini Enterprise Agent Platform Code Execution
Technical identifiers
Technical identifiers unchanged. Only the customer-facing product name changed; the APIs, CLI commands, IAM roles and Terraform resources below keep their legacy identifiers for backward compatibility.
| REST / gRPC APIs | aiplatform.googleapis.com |
|---|---|
| gcloud / CLI Commands | gcloud ai |
| IAM Predefined Roles | roles/aiplatform.* |
| Terraform Resources | google_vertex_ai_reasoning_engine |
Uses the reasoningEngines resource under aiplatform.googleapis.com.
Notes & disambiguation
- Underlying API resource path remains reasoningEngines on aiplatform.googleapis.com.
- Associated Agent Engine sub-features were renamed to Agent Platform Sessions (Gemini Enterprise Agent Platform Sessions), Agent Platform Memory Bank (Gemini Enterprise Agent Platform Memory Bank), and Agent Platform Code Execution (Gemini Enterprise Agent Platform Code Execution).
Sources & official documentation
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