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Alex Albert on AI · ViralLoop

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Post by Alex Albert on X

Alex Albert@alexalbert__

It's also dramatically more efficient. On SWE-bench Verified at medium effort, Opus 4.5 beats Sonnet 4.5 while using 76% fewer output tokens. The new effort parameter lets you trade off intelligence for cost/latency with a single dial.

241 likes9 repliesPosted Nov 24, 2025

View the original on X Written by Alex Albert. Captured Sep 4, 2026.

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Based on absolute engagement — the platform doesn’t expose follower counts here, so large accounts score higher.

From likes, comments.

Why it worked

Short enough to read in full without expanding, which removes a step before the point lands.
Short sentences keep the pace up, so the reader never has to re-read a line.

The mechanics

Hook: Plain observation
Structure: Hook → Landing
Style: Conversational paragraphs at a steady pace.
Tone: plain, matter-of-fact
Written for: People building with AI

Analysis by ViralLoop — not written by the original author.

Topics

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More from Alex Albert

Fable 5.1 is a beast at many things but one thing in particular I have been having a ton of fun with is generating videos through code. For this one I gave it a picture of a property lot. It designed a house for the lot, rendered it, and produced a cinematic walkthrough.

The way I keep describing Fable 5.1 to people is that it just works. I explain what I want in a few vague, messy sentences, and it figures out the rest. It fills in the gaps the way I would have. It's a truly impressive model in so many ways and I hope you enjoy using it!

Some of my favorite graphs from Opus 5 launch. We put a ton of work into making this model token efficient across domains while still raising the intelligence bar. It feels very smooth to use and I prefer it over Fable 5 for many coding tasks.

Starting June 15, paid Claude plans include a monthly Claude Agent SDK credit. It covers usage on your own scripts and agents, claude -p, and third-party apps built on the SDK (OpenClaw, Conductor, etc) and it's separate from your regular usage limits.

Some of my favorite things in Opus 4.7: - Very good at async work and following instructions - Effort levels are far more predictable for token control (+ new xhigh level) - No more downscaling of high-res images - Noticeably more taste in UIs, slides, docs

New version of Claude Code in the desktop app dropped today with tons of new features and performance improvements. Between Cowork and Code, I've found I don't really need to open other apps (or even my terminal) to do most of my work now.