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…

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.

Anthropic Readies Opus 4.7 and Design Tool as VCs Offer $800 Billion Valuation

Anthropic is preparing to release Claude Opus 4.7 and a natural language design tool as early as this week, while venture capital firms have offered to invest at valuations exceeding $800 billion – more than double the company’s last official price tag.The model ID anthropic-claude-opus-4-7 appeared on Google Vertex AI’s quota management page for EU […]

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.

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

Anthropic Preps Opus 4.7 and Full-Stack AI Studio—While Sitting on Something Much Scarier - Decrypt

Anthropic’s Claude Opus 4.7 and new AI design tool signal a push into full-stack development, while its Mythos model raises concerns.

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.

I gave Opus 5.5 one prompt and six hours to visualize Invisible Cities - Quesma Blog

Claude Opus 5.5 vs GPT-6 Astra one-shot Invisible Cities by Italo Calvino in Three.js: AI design, UX, data visualization and explorable explanations.

Claude Opus 4.8: The System Card

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

Ahmad on Twitter / X

HUGEGLM 4.5 beats Claude in Agentic Workflows> beats them head-to-head> 72x cheaper than opus 4 ($207 vs $2.9)> 15x cheaper than sonnet 4 ($41 vs $2.9> leading the Berkeley Function-Calling Leaderboard V4I have been saying this for a month now :) https://t.co/KOKaWo7yH5 pic.twitter.com/LJCnaeBK1t— Ahmad (@TheAhmadOsman) August 28, 2025

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 #187: Coming Into Play

Opus 5.5 was released on Tuesday.

Claude Opus 5.5: The System Card

Introducing the world’s most powerful model, at least by some measures like Artificial Analysis or any standard benchmark list, which is now Claude Opus 5.5.