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Modelsmedium signal

Amazon Bedrock added Kimi K3, and its agent runtime now starts in about two seconds

Two Bedrock announcements landed on September 18, 2026. Kimi K3, which Moonshot AI describes as the first open model with 2.8 trillion parameters, is generally available, and it is the first open-weight model on Bedrock that supports explicit prompt caching. The runtime agents run inside was replaced at the same time: AWS measured a P75 cold start of 1.9 to 2.0 seconds for container images from 200 MB to 2 GB, against 5.4 to 30 seconds on the previous version. Memory is now released during a session instead of being held at the peak.

Amazon Web Servicesverified

SAGEMAKER HYPERPOD60%faster scale-out, on AWS's own benchmark
Modelsmedium signal

AWS added model caching to SageMaker HyperPod and measured about 60% faster scale-out

SageMaker HyperPod can now keep model weights on a node's local NVMe and pre-pull the container image, so a pod that used to wait minutes for downloads starts in seconds. AWS reports benchmarks across models from 57 GB to 145 GB showing around 60% faster scale-out, and an image cache that removes over two minutes of pull time, a 97% reduction. Those figures are the vendor's own and arrived without a description of the test. On the same day AWS made TwelveLabs Marengo 3.0 available as an embedding model in Amazon Bedrock Managed Knowledge Base, so a knowledge base can index what a video shows rather than only what was said in it.

AWSverified

Agentsstrong signal

GitHub Copilot switches GPT-6 Astra on by itself and leaves Claude Fable 5.1 off

GPT-6 Astra became generally available in GitHub Copilot on September 4, 2026, for the Pro+, Max, Business, and Enterprise plans. Claude Fable 5.1 reached the same four plans three days earlier. The two arrived with opposite administrator defaults: Astra is enabled automatically under default model enablement, while the Fable 5.1 policy is off until someone turns it on. Fable 5.1 is also the one that retains prompts and outputs, and the zero-retention exemption runs only to the end of the calendar year.

GitHubverified

Connectorsmedium signal

AWS Agent Registry is generally available and answers as an MCP server

AWS took Agent Registry out of preview on August 31, 2026. It is a private catalog of the agents, tools, skills, MCP servers, and custom resources an organization already runs, with search, approval, and audit trails on top. General availability adds provisioning as code, cross-account sharing, and automatic detection of agents running on AgentCore. The registry is also exposed as an MCP server, so an assistant in an editor can query it during a task.

AWSverified

Agentsstrong signal

Files, Agent Skills, and the Admin API leave beta

On August 19, Anthropic moved a large part of the Claude platform from beta to general availability. The Files API no longer requires a beta header and gains file expiry through expires_in_seconds, pagination, and filtering by identifier, alongside a terabyte of storage per organization and a limit of 500 requests per minute. Agent Skills and the accompanying Skills API also became generally available, so skills now load through the Messages API without a single beta header. Managed Agents gain allow and block lists of domains for search and content fetching, and the session viewer in the console was redesigned with a timeline minimap and an Inspector panel. Anyone building an agent over client content gets three critical parts of the API that stop being a moving target.

Anthropicverified