AI #187: Coming Into Play

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.

AI #165: In Our Image

This was the week of Claude Opus 4.7.

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.

Felix Rieseberg on Twitter / X

I remade my homepage with Opus 5.5 and pushed it hard. We made music & movies, drew textures, modeled things in Blender: https://t.co/WOGPQVm6FqI'm really happy with the result! pic.twitter.com/y6yUXaKb7K— Felix Rieseberg (@felixrieseberg) September 27, 2026

Claude Opus 5: The System Card

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

Claude Opus 5 Is Highly Capable, But Is No Mythos

Claude Opus 5 is a weirder than usual release to evaluate, for two reasons.

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.

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.

AI #177 Part 1: Tip of the Iceberg

This week saw the releases of, among other things:

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