OSID
April 7, 2026, 7:37am
1
Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
Describe the issue : Installing openserach for the first time, need guidance on the stable version
Configuration :
Relevant Logs or Screenshots :
pablo
April 7, 2026, 8:25am
2
Hi @OSID . Welcome to the forum.
The best source of information is the OpenSearch documentation:
Is this your first cluster?
OSID
April 7, 2026, 8:39am
3
Hi Pablo, Thanks for your response
Yes this is the first cluster. I see that version 3.5 is still developing phase.
So was checking for stable version to use in PROD as well.
pablo
April 7, 2026, 8:58am
4
@OSID Where did you find that? 3.5 is GA since 10 Feb 2026 as per OpenSearch documentation
# OpenSearch and OpenSearch Dashboards 3.5.0 Release Notes
## Release Highlights
OpenSearch 3.5 delivers several features and enhancements designed to support your search, observability, and AI-powered applications, including new agentic AI tools, expanded Prometheus support, upgrades to the Search Relevance Workbench, and more.
### New and Updated Features
* **Agentic conversation memory**
Maintains persistent, structured memory for AI agents, directly in OpenSearch, capturing conversation context and intermediate tool reasoning for more coherent follow-up answers. Built-in validation surfaces misconfigurations early for more reliable agent interactions.
* **Hook-based context management**
Dynamically optimizes context before sending requests to LLMs, avoiding context window overflow and reducing token usage. Supports automatic truncation, summarization, and sliding window strategies at different agent execution stages.
* **Enhanced ML Commons connector framework**
Supports custom-named actions and additional HTTP methods (PUT, DELETE) for more flexible integration with external REST APIs, enabling comprehensive CRUD operations through a single connector.
* **Bulk SIMD implementation**
Achieves as much as 58% throughput improvement for FP16 vectors in multi-segment scenarios while maintaining 94% recall. Single-segment scenarios see up to 28% performance gains.
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OSID
April 7, 2026, 10:14am
5
Thanks Pablo, I am planning to install 3.4.0 in our PROD env.
In a production setting, as for 3.5.0 it is standard practice to wait for at least one or two minor patch releases (e.g., 3.5.1 or 3.5.2) to ensure any “day-one” bugs are ironed out.
Please let me know if any other suggestion.
pablo
April 7, 2026, 10:43am
6
@OSID It all depends on the type of deployment. Either your main goal is significant ingress, search or ML, etc.
In my opinion, the easiest way is to start with Docker Compose and play around with it.
Alternatively, you could try OpenSearch Playground
