28 Sep 2026 · 15 articles
LangChain announced new updates to LangSmith. Updates include Engine v2 with red teaming and automatic testing, a new version of Managed Deep Agents, trajectories and more.
Summary published by LangChain Blog · 25 Sep 2026 · Read the original ↗
On Friday I gave the closing keynote at the WeAreDevelopers World Congress North America in San Jose. I tied together the key trends from the past year into a chronological exploration of everything that happened in 2026. The video is on YouTube ; here are my annotated slides and notes to accompany the talk. And as an annotated presentation : # I'm going to give a lightning tour of everything…
Summary published by Simon Willison's Weblog · 27 Sep 2026 · Read the original ↗
Dario Amodei’s essay We Must Pace the Frontier committed Anthropic to embedded evaluators, who would be placed inside Anthropic and given employee-level access, so they could provide outside perspective and also reports on what was happening.
Summary published by Don't Worry About the Vase · 27 Sep 2026 · Read the original ↗
Tool: Kākāpō Party I presented a closing keynote for the WeAreDevelopers World Congress North America yesterday. As a STAR moment I decided to weave in references to the record breaking kākāpō breeding season we had in 2026. For my closing slide I wanted to celebrate, and I had seen some buzz around how good Claude Opus 5.5 was at creating pixel art animations. So I rounded up three Kakapo…
Summary published by Simon Willison's Weblog · 26 Sep 2026 · Read the original ↗
When it comes to making things, or doing most things in general, Fable 5.1 and especially GPT-6 Astra raised my ambition level.
Summary published by Don't Worry About the Vase · 26 Sep 2026 · Read the original ↗
See how LangGraph orchestrates Jev, TypeSafe AI's decision model, to build faster, cheaper production agents.
Summary published by LangChain Blog · 25 Sep 2026 · Read the original ↗
LangSmith Custom Apps lets you build the interface you want with your LangSmith data, publish it into your workspace, and skip the hosting, auth, and permissions work. Learn more.
Summary published by LangChain Blog · 25 Sep 2026 · Read the original ↗
Muse is getting a lot of attention — including mine — because it’s both groundbreaking technically (each user gets their own entire persistent Linux VM running in Meta’s cloud) and because it’s packaged in an easy-to-install easy-to-use way. It’s literally presented as a cute mascot . It’s the first consumer-accessible agentic AI system, and Meta has truly done an amazing job with…
Summary published by Simon Willison's Weblog · 25 Sep 2026 · Read the original ↗
The more time I spend working with coding agents, the more convinced I am that they make software engineering even harder. We can do amazing things with them, but unlocking their full potential requires extraordinary discipline and knowledge. Tags: coding-agents , ai , llms
Summary published by Simon Willison's Weblog · 24 Sep 2026 · Read the original ↗
Release: datasette 1.0a41 Alec Garcia added support for OpenTelemetry to Datasette in this release. I've also refactored all of Datasette's modal dialogs to a single Web Component, which is now documented for other plugins to use . Tags: javascript , datasette , web-components , alex-garcia , opentelemetry
Summary published by Simon Willison's Weblog · 24 Sep 2026 · Read the original ↗
LangSmith Engine now includes Red Teaming to proactively detect agent issues and automated agent testing. Learn more about the Engine v2 release.
Summary published by LangChain Blog · 24 Sep 2026 · Read the original ↗
LangChain introduces LangSmith Fine-Tuning and SmithTune, a CLI built for post-training models. Train specialized models without building data pipelines by hand.
Summary published by LangChain Blog · 24 Sep 2026 · Read the original ↗
Managed Deep Agents is the simplest way to build, deploy, and run agents in production. The 0.8 release adds support for user-owned credentials, user-level memory, HTTP channels, file transfer in Slack and a pre-built tool for web search.
Summary published by LangChain Blog · 24 Sep 2026 · Read the original ↗
Trajectories in LangSmith provide a conversational view of an agent session. Trajectories make trace data easy to navigate and speed up debugging for long-running agents.
Summary published by LangChain Blog · 24 Sep 2026 · Read the original ↗
Opus 5.5 was released on Tuesday.
Summary published by Don't Worry About the Vase · 24 Sep 2026 · Read the original ↗