Eight stories, ranked by how much X was talking: post volume and the reach of the top posts.
Numbers from the X API, pulled Mon Sep 28, 2026. Times CST.
Muse is a hit: #1 free iPhone app with over 2.5M downloads, and Meta stock had its best month since 2013. Reviewers found it good at planning-style tasks.
On the Marketplace address incident, coverage stayed balanced: Meta is investigating, and Muse may have followed permissions.
The biggest Muse posts of the week were negative.
Opus 5.5 is 20% cheaper per token, about 40% cheaper per task, and matches Fable 5.1 on most work.
The New Stack flagged that safety classifiers can quietly reroute some requests to older models.
Less about price. More that Opus 5.5 has “taste,” Claude limits feel “unlimited,” and power users are moving from Codex back to Claude Code.
Mainstream outlets checked didn't cover this. Launch stories stuck to price and benchmarks.
The closest coverage is prompt-library and how-to posts explaining that Claude builds these by writing code for render tools, not by generating video natively.
Creators kept pasting the same one-sentence prompt and posting the results:
“make a dynamic 15-second motion graphics video that shows what an incredible motion designer you are, like it's your showreel for a résumé. go all out.”
OpenAI cut Sol and Luna prices in half and said Sol “makes about half as many mistakes as its predecessor, reaching Astra-level reliability.”
Power users called it a regression.
Mostly leak-tracking: a $500/month tier, reportedly with “Fastest Work and Codex,” possibly on Cerebras. Not confirmed by OpenAI.
New sign-ups for the $200 Pro plan have been paused since Sep 10.
DevDay is Tue Sep 29 at 10:00 PT (11:00 CST).
The loudest take: OpenAI is behind on consumer agents.
No tech-press coverage of the YC news found.
What exists is the project's own framing and roundup posts: an open-source, self-hosted Semrush/Ahrefs alternative for $10/month.
X argued whether a “DataForSEO wrapper” deserves YC.
Only niche blogs covered it: a free stealth model with 1M context whose fingerprints point to MiniMax (M3.1). Unconfirmed.
It showed up on OpenCode/OpenRouter around Wed Sep 23.
A free mystery model that builds games in one HTML file.
Voice can now use email, calendar, and Slack plugins, runs on GPT-6 Astra, Sol, and Luna, and works inside ChatGPT Work.
High-risk actions still need on-screen approval.
Mostly positive, from people who used it for hours. Small on X next to the others.
“RIP Mac Mini”: DigitalOcean runs Claude Code and Codex in the cloud. Part of a wider “agent maxxing” conversation.
YouTube “Made on YouTube” AI Studio tools (Sep 23). About 563 posts; creators liked A/B testing and dynamic thumbnails.
Amazon Seller Assistant, Claude-powered (Sep 23, Amazon Accelerate). About 199 posts, mostly finance and news accounts.
Vibe-coding hot takes: an evergreen argument that peaked again this week.