Felix Rieseberg on Twitter / X

Introducing Claude Opus 5

Opus 5 is a step change improvement for the Opus tier powering long-running agents while delivering improvements in coding and professional work.

AI #187: Coming Into Play

Opus 5.5 was released on Tuesday.

Claude Opus 4.8: The System Card

Only six weeks after Opus 4.7, we have Opus 4.8.

Claude Opus 4.7 Is Here: Release Confirmed April 16, 2026

Claude Opus 4.7 shipped April 16, 2026. SWE-bench 87.6%, xhigh mode, /ultrareview, 2,576px vision. Read our full first-look review.

Opus 4.5 Limits have been cracked down on

30 votes, 63 comments. I'm on the Pro plan, but sent my last message at midnight last night. Came on at 8:30 am and sent 2 messages, which resulted…

ᖴά𝐂τσ on Twitter / X

Unpopular opinion: Opus 4.7 isn't the problem. The problem is a $200/mo "Max" plan that burns out in 15 minutes of real coding. Anthropic shipped a model people want to use and a pricing tier that punishes them for using it. That's not a rate limit. That's a strategy. pic.twitter.com/DVbzvdUHdq— ᖴά𝐂τσ (@cryptofacto) April 17, 2026

AI #165: In Our Image

This was the week of Claude Opus 4.7.

Introducing Claude Opus 5.5

Claude Opus 5.5 leads in agentic coding and knowledge work, and costs 40% less to run than Opus 5 on typical workloads.

Announcing VibeBench: The AI benchmark that measures what matters — how models like Opus-4.7 actually feel to use in real-world work.

My coworkers and I have been long-time users of Claude Code and Codex and are getting a ton of exposure to other models due to our deep dives into…

Opus 4.7 isn't dumb, it's just lazy — Shimin Zhang

Some follow up experiments with Claude Opus 4.7 based on Simon Willison's Pelican Benchmark Shocker.

Did Claude 3 Opus align itself via gradient hacking? — LessWrong

> Claude 3 Opus is unusually aligned because it’s a friendly gradient hacker. It’s definitely way more aligned than any explicit optimization targets…

Claude Opus 5: The System Card

Claude Opus 5 is trying to be the best of both worlds.

Open Social Media: Eine Einführung auf Deutsch - Hilke schreibt

Im Dezember 2025 wurde ich vom Musikbüro Basel eingeladen, einen Workshop über Alternativen für Big Tech im Musikbereich zu leiten. Der Workshop wurde aufgenomm...