AI news

Claude Code now reads AGENTS.md

Starting in Claude Code 2.1.277, a project without a CLAUDE.md file gets AGENTS.md instead. Same place in the context. Same framing. Anthropic shipped it as a built-in plugin, not a rewrite of the engine.

The default is fallback: if the project already has a CLAUDE.md, .claude/CLAUDE.md, or CLAUDE.local.md, Claude Code stays on that file and leaves AGENTS.md alone. You can change the mode in /config, under Project instructions.

There are four choices. CLAUDE.md only. AGENTS.md when there is no CLAUDE.md. Both files at once. Or managed-only, which drops the project and personal files and keeps the organization file. You can also turn the plugin off in /plugin.

This is the file I already keep in repos so Cursor and Codex start with the same rules. Claude Code catching up means I can stop maintaining a second CLAUDE.md just for that tool.

agents-md plugin on GitHub →What is an AGENTS.md file →

TypeSafe left stealth with Jev

TypeSafe AI came out of stealth on September 15, 2026 with $40M in seed funding and Jev as its first public model. Jev is not a chatbot and not a coding model. You send it data plus a list of typed questions, and it returns one answer per question with probabilities.

TypeSafe calls it a System One model: a small component inside ordinary software, not the interface. Input is $0.042 per million tokens. Output is free. Most calls finish in about 100 milliseconds. Access is still early. You join a waitlist at typesafe.ai.

TypeSafe AI →A deep dive into Jev →

OpenAI released GPT-6 Astra

OpenAI launched GPT-6 Astra on September 3, 2026. It is their new flagship. The API id is gpt-6-astra. It started with a limited set of organizations, then rolled out to ChatGPT Plus, Pro, Business, and Enterprise, plus Azure and Amazon Bedrock.

They present it as the step after GPT-5.6 Sol for computer use, browsing, coding, science, and professional work. It is also the first OpenAI model they marked Critical for cybersecurity under their Preparedness Framework. The most advanced cyber tools stay limited.

I have not used Astra as my daily driver yet. Sol is still the model I send precise coding work to in Cursor.

OpenAI announcement →

Anthropic released Claude Fable 5.1

Fable 5.1 shipped on September 1, 2026. Same price as Fable 5, $10 input and $50 output per million tokens, with cheaper cache reads. The API id is claude-fable-5-1. Mythos 5.1 is the same model without the extra classifiers, still limited to Project Glasswing.

Anthropic says it is better on long agent runs and less likely to declare success when it is stuck. That matches how I use Fable: planning, review, and judgment, not the first pass at a small code change.

Anthropic announcement →

Grok Bot opened to more Cursor and SuperGrok plans

Ten days after launch, xAI expanded Grok Bot beyond SuperGrok Heavy, Cursor Ultra, and Cursor Teams Premium. SuperGrok Plus, Cursor Pro+, and every Cursor Teams subscriber got in, plus a limited trial for other users.

You still sign in with a Cursor account. The Bot still runs on one cloud computer shared by all your Bots.

xAI announcement →A deep dive into Grok Bot →

SpaceX closed the Cursor acquisition

SpaceX closed the Cursor deal on August 14, 2026. Cursor sits in the same company as Grok Bot. That is why a Grok Bot login is a Cursor login, and why a Bot can hand work to a Cursor cloud agent.

xAI had already taken the SpaceXAI name in July. The August close is the one that put the coding IDE and the always-on Bot under one roof.

The Verge →Grok Bot vs Cursor Projects →

xAI launched Grok Bot

Grok Bot entered public beta on August 11, 2026 for SuperGrok Heavy, Cursor Ultra, and Cursor Teams Premium. A Bot is a named worker with its own memory, skills, and routines. It runs on a persistent cloud computer that keeps going after you close the laptop.

All of your Bots share that one machine. They share files, browser sessions, and credentials. I use it for jobs that start behind a login, not for work that should end in a pull request.

xAI announcement →A deep dive into Grok Bot →

GPT-5.6 Sol became generally available

OpenAI previewed the GPT-5.6 family on June 26, 2026: Sol as the flagship, Terra for everyday work, Luna as the cheap fast one. A small partner group got API and Codex access first.

General availability landed on July 9, 2026 in ChatGPT, Codex, and the API. Sol is the model I still pick when the task is specified well enough that I want the code written carefully.

OpenAI announcement →

xAI became SpaceXAI

On July 6, 2026 the xAI account on X switched to @SpaceXAI and shipped a new logo. SpaceX had already bought xAI in February. July was the public name change, not the ownership change.

Grok, X, and later Cursor all sit under that brand. Product pages still say xAI in a lot of places, including the Grok Bot docs.

Engadget →

Anthropic released Claude Fable 5

Fable 5 launched on June 9, 2026. Anthropic called it a Mythos-class model made safe enough for general use. The API id is claude-fable-5. Price is $10 input and $50 output per million tokens, with a 1M context window.

Mythos 5 is the same weights with some safeguards off, first for Project Glasswing. On the public product, a Fable 5 request can still get handed to Opus 5.

This is the model that made the named-tier thing real for me. Opus stayed in the mix. Fable became the one I use when the job is judgment, not typing.

Anthropic announcement →