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Anthropic· Released Sep 22

Claude Opus 5.5

First model in Anthropic's Claude 5.5 family. Positioned for agentic coding, knowledge work and long tasks; priced at $4/$20 per million input/output tokens, about 30% faster output than Opus 5, and top scores on Anthropic's behavioral alignment audit.

Warehouse management software styled like a strategy gameOct 3

Entries

u/no-shadowban-lmao

@no-shadowban-lmao · Oct 7

Six months of building a terminal with built-in multiplexing and multi-machine workspaces using Claude Code, from a longtime terminal fan.

u/RaspberryStill3377

@RaspberryStill3377 · Oct 6

Saves and restores window layouts for design, coding, 3D and marketing sessions; built by an indie dev tired of re-arranging apps.

u/wanderingstan

@wanderingstan · Oct 5

Run /join-call with a Meet link and the session appears as a participant with its own voice and a shared whiteboard, built to stop pasting transcripts mid-call.

u/bbling19

@bbling19 · Oct 2

Open your app in Chrome, click an element and describe the change, and it is sent to Claude Code, saving the slow back-and-forth over spacing and polish.

u/alpcanaydin

@alpcanaydin · Sep 29

Annoyed by a $49 renewal, the builder had Claude Code on Opus 5.5 write a database client in two days using about 10% of a weekly limit.

u/LordKittyPanther

@LordKittyPanther · Sep 29

Agents running on three Claude accounts generated and killed 245 business ideas in a week, keeping a German e-invoice validator, and earned $0.00. A candid look at autonomous business-building.

u/george-lin

@george-lin · Sep 28

A developer-oriented desktop client built with Claude after existing tools failed their needs; now at 0.2.x after two months of iteration.

u/singing_coach_ai

@singing_coach_ai · Sep 27

Opus 5.5 remade Pokemon Red as a browser game with every pixel drawn in code and no image files, from one prompt; source and a 7 minute build video are public.

u/Jealous-Wedding6867

@Jealous-Wedding6867 · Sep 25

A drawable live map of all hosting, domains, SaaS accounts and databases that warns when something expires, built after a customer was the first to notice an outage.

Claude Opus 5.5: quick answers

What can you build with Claude Opus 5.5?
People have published 201 public builds made with Claude Opus 5.5. The most common uses are animation videos (58), games (45), 3d graphics (22), design (14) and education (13).
What are the best Claude Opus 5.5 GitHub repos?
The most-starred open-source Claude Opus 5.5 projects in the index are "I'm Upping My P(doom)" music video, full source, Awesome Opus 5.5 Videos (prompt gallery) and LiveNerf: daily check for Opus 5.5 degradation.
Are there Claude Opus 5.5 demo videos?
Yes: 1 video show Claude Opus 5.5 in use, each linked to the original post.
Where do people share Claude Opus 5.5 projects?
Mostly on X, Reddit and GitHub, from 186 creators between Sep 22 and Oct 7.