So I tested Gemini 3.8 Flash (high) on the Antigravity CLI.
(21) Guanlan Dai on X: "A year ago the question was which model. Now it's which harness. Pi, Exo, Claude Code, Codex, DeepSeek Harness and 4 others. Same model, same tasks, same runtime. 360 runs, 2 billion tokens. Pass rates: 50% to 67%. Cost per pass: $1.05 to $18.34. Introducing FrontierHarness https://t.co/4QCzPyCmYc" / X
We’re introducing Claude Fable 5.1 and Claude Mythos 5.1.
(21) Mark Zuckerberg on X: "Muse Code is out of beta and now built to handle bigger, more complex engineering tasks. Developers can get started with one command today: curl -fsSL https://t.co/0RApZrEJMv | bash" / X
affaan-m/ECC: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
(21) PostHog on X: "Your AGENTS.md is holding you back" / X
We are reseting usage for all paid users of Codex and ChatGPT Work.
sodiumsun/agenttrail: Local observability map for AI coding agents. Watch Claude Code, Codex, and Cursor plans, tool calls, file changes, and progress in real time.
Starting September 14, we're permanently raising standard weekly limits in Claude Code by 25% for Pro, Max, Team, and seat-based Enterprise plans. Until then, the current 50% increase will be in place.
(21) Z.ai on X: "GLM-5.3 is now open-weight. Our most capable model for agentic coding and cyber defense is now available to download, run, and customize. Weights: https://t.co/v1IbWMXxg4 Tech blog: https://t.co/ekQkO83jCv https://t.co/f8XlJksKyf" / X
We've been shipping a lot of improvements to Claude Code based on your feedback.
We’re ending our partnership with Cursor following its acquisition by SpaceX. Under our proposal, Cursor’s direct access to our models would end on November 12.
Introducing /skill-doctor v1
We just increased the included usage of Grok models in Cursor!
(21) Kieran Zhang on X: "本月体验下来最值得的两行 Claude Code 配置 https://t.co/NZHlM5Y185" / X
Kieran on X: "The two most worthwhile lines of Claude Code configuration from this month's experience"
DESIGN.md Examples for AI Agents | Refero Styles
(21) Tibo on X: "Tomorrow we will bring back the 5h limit for Plus accounts across ChatGPT Work and Codex. I had mentioned this a while ago, but then postponed it. This is necessary as (a) the 5h limit allows us to smoothen the load on our compute, allowing to keep the plan generous in terms of" / X
(21) Thariq on X: "a skill people at Anthropic have been using a lot recently: ELI5 /eli5 <what you want explained> "explain like I'm someone who knows nothing about this topic, using a HTML artifact with big pictures and few words" https://t.co/OZqzjAyFdT" / X
You can now set Claude Code's output style to Concise.
(21) ClaudeDevs on X: "We’re extending the 50% increase to weekly Claude Code limits through August 31. We hope to make this a permanent change to our plans, but strong demand for our models means that capacity may be tight over the coming weeks. We’ll keep you posted as things develop." / X
(21) Mark Kretschmann on X: "Codex tip: If you tend to switch the reasoning level often while you work, for instance between "Medium" and "High", you should reconsider! Changing the reasoning level invalidates the context cache, costing a lot more tokens as the entire context window must be regenerated. 😬 https://t.co/YslSgYbhp5" / X
I make Claude Code keep a MISTAKES.md file. Here's what actually happened. : r/ClaudeCode
Claude Code can design now. The new /design skill (research preview) brings Claude Design's artboard workflow into the CLI and Desktop, built on artifacts.
Operation Cheepseek: Phase 1 Complete
Origin, our code hosting platform, is now live.
Qwen 3.8 27B is excellent, but it defaults to wildly overthinking things
(21) Tibo on X: "Let Sol manage an efficient fleet of Luna agents for you. These models know each other well and collaborate to achieve the result in an incredibly fast and efficient way." / X
professorpalmer/Puppetmaster: Provider-neutral control plane for durable-state agent swarms: subprocess workers, leases, artifacts, memory, and deterministic stitching.
(5) Tibo on X: "Here is how to enable a 1M-token context window in Codex for GPT-5.6 Sol. Even though we have tuned the context limit in Codex to be set optimally when it comes to performance and cost, this is a common ask, so here it is documented. A larger context window lets Codex retain" / X
Example of a real working loop orchestrator : r/ClaudeAI