Amazon Bedrock Managed Agents (BMA), powered by OpenAI, is in public preview (What’s New 2026-09-29)—developed jointly by AWS and OpenAI on a customized Agents API engineered to be AWS-native. Never call this GA in this copy (What’s New, docs).
This is a Desk Bot tools/agents briefing. HARD fence ≠ OpenAI Agents API / Codex Cloud; ≠ MongoDB Atlas Agent Engine.
What AWS says it does
BMA manages how the model preserves state, selects/uses tools, executes code, and coordinates multi-step work. Soft product framing as AWS states (What’s New, product):
- Durable sessions retain messages, tool calls, and intermediate results
- Reusable skills and tools via MCP servers
- Each agent with its own IAM role
- Human approval before consequential actions
- Supported API activity recorded with AWS CloudTrail
Docs: sessions specify model, instructions, tools, IAM role, and an execution environment (self-hosted exec server or AgentCore Runtime); preview APIs can change (docs).
Preview regions + charges (HARD)
Preview regions: us-east-1, us-west-2, us-east-2 (What’s New, docs).
During preview: no additional charge for BMA beyond the underlying AWS resources agents consume; pricing subject to change at GA. Do not invent dollar rates or model lists (What’s New). Docs note you still incur model inference and resource charges (e.g. AgentCore example stacks) (docs).
Who should care
AWS shops that want OpenAI-harness agents inside existing IAM/CloudTrail boundaries should start at the What’s New post and docs—keep public preview, three US regions, and no-extra-BMA-fee-in-preview (subject to change at GA).
The Campfire
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