Claude Opus

I've published detailed notes and an annotated transcript to accompany the video of the keynote I gave at @WeAreDevs World Congress North America in San Jose on Friday - here's my rundown of everythi…

@simonw·Sep 29, 2026↗

Claude Opus 5.5 drew every frame of this animation in JavaScript. The whole family's running late to Grandma's birthday. Clawd has one hour to get them there. https://t.co/nbBbnASgwe

@kevin_t_ngo·Sep 24, 2026↗

Claude Opus 5.5 drew each frame of this animation in JavaScript. Here's "how browsers work" in 40 seconds. https://t.co/uX4DZSkKXu

@addyosmani·Sep 24, 2026↗

I've asked Claude Opus 5.5 to create 100 HTML files Rules were simple: - look stunning - zero repetitive designs - go full creative mode CLAUDE OPUS 5.5 IS THE BEST MODEL I HAVE EVER TESTED !!! Th…

@MiaAI_lab·Sep 23, 2026↗

We tested Claude's Opus 5.5 for a week. Some tips: 1. Set a time goal. It won't stop on its own, and it'll eat your weekly limit. Say "10 minutes, produce X." 2. Name the deliverable. We asked for a…

@every·Sep 22, 2026↗

Claude Opus 5.5 is the best LLM for Operations we've benchmarked. It scored 40% on @Zapier's AutomationBench: 657 of the hardest real business workflows we have, across 6 departments. It excelled …

@wadefoster·Sep 22, 2026↗

Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5. https://t.co/Q9C2VKQ79f

@claudeai·Sep 22, 2026↗

Jev is INSANE. 🤯 in 24.9 seconds it read 384 news from this morning and told 15 brands which stories to hop onto today, for $0.19. Claude Opus 5, running on the same feed at the same time, got thr…

@elvissun·Sep 18, 2026↗

I made a website with 25 mini rooms, each with Claude keeping people company. Created with Claude Opus 5. https://t.co/VMRs5waWO5

@kevin_t_ngo·Sep 16, 2026↗

Claude Opus 5 one-shotted this game. EVERYTHING you see in this demo is custom code... not a single external asset was used. AI games are going to be amazing. (sound on)

@mattshumer_·Jul 25, 2026↗

BREAKING: Claude Opus 5 is OUT NOW! And…it’s a hard model to love. We’ve spent the last week @every testing it across coding, writing, knowledge work, and our internal agent. It argued with instru…

@danshipper·Jul 24, 2026↗

Introducing Claude Opus 5. It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price. https://t.co/GQWhcq2CQL

@claudeai·Jul 24, 2026↗

New Frontier Red Team blog: Phase 2 of Project Fetch, where we test how well Claude can program a robodog. Opus 4.7, on its own, was ~20x faster than last year's best human team aided by Opus 4.1. (…

@AnthropicAI·Jun 18, 2026↗

Notes on Claude Opus 4.8, plus pelicans riding bicycles for each of the five different thinking efforts https://t.co/8J0s0fLAnT https://t.co/EdJfdYIBF4

@simonw·Jun 2, 2026↗

Introducing Claude Opus 4.8: it builds on Opus 4.7 with sharper judgment, more honesty about its own progress, and the ability to work independently for longer than its predecessors. Available today…

@claudeai·Jun 2, 2026↗

Since Anthropic publish their system prompts we can generate a diff between Claude Opus 4.6 and 4.7 - here are my notes on what's changed https://t.co/IQHuvLGmwO

@simonw·Apr 19, 2026↗

Introducing Claude Design by Anthropic Labs: make prototypes, slides, and one-pagers by talking to Claude. Powered by Claude Opus 4.7, our most capable vision model. Available in research preview on…

@claudeai·Apr 17, 2026↗

Introducing Claude Opus 4.7, our most capable Opus model yet. It handles long-running tasks with more rigor, follows instructions more precisely, and verifies its own outputs before reporting back. …

@claudeai·Apr 17, 2026↗

Claude Opus 4.7 has arrived in Droid. Available 50% off for all users through April 30th. https://t.co/9jG6yioU10

@FactoryAI·Apr 17, 2026↗

We released Claude Opus 4.6 just two months ago. Today we're sharing some info on our new model, Claude Mythos Preview. https://t.co/Dz6um6HAWZ

@alexalbert__·Apr 7, 2026↗

Something I wanted to see if Claude Opus 4.5 could do: clone a fully functional Billion $ SAAS product and make it at least 100x cheaper. The first product that came to mind was TypeForm because it'…

@dabit3·Dec 31, 2025↗

We put together a prompting guide for Claude Opus 4.5 based on extensive internal testing by our research and applied AI teams. Here's what we've learned so far about getting the best results:

@alexalbert__·Nov 25, 2025↗