---
format: "aidr-story-markdown/v1"
id: "9bcf5b71412aba7c81c2d218f2f378b64a092d853be1f575b2750551b07c5d61"
canonical_url: "https://aidr.today/9bcf5b71?lang=en"
title: "Anthropic says outdated prompting habits are slowing down Claude Opus 5.5"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-11-14T16:42:56.000Z"
category: "Models"
topics: ["anthropic","llm"]
source_urls: ["https://the-decoder.com/anthropic-says-outdated-prompting-habits-are-slowing-down-claude-opus-5-5/"]
summary: "Anthropic made Claude Opus 5.5 the default model on all paid plans. Anthropic published a guide that advises dropping \"think hard\" and starting at Medium effort."
---

# Anthropic says outdated prompting habits are slowing down Claude Opus 5\.5

> [Open the canonical story](<https://aidr.today/9bcf5b71?lang=en>)

**Published:** 2026-11-14T16:42:56.000Z
**Category:** Models
**Topics:** anthropic, llm

## Summary

Anthropic made Claude Opus 5\.5 the default model on all paid plans\. Anthropic published a guide that advises dropping "think hard" and starting at Medium effort\.

## Sources

- [Story source](<https://the-decoder.com/anthropic-says-outdated-prompting-habits-are-slowing-down-claude-opus-5-5/>)