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Anthropic's Opus 5.5 struggles with lengthy code refactoring task

By PulseAugur Editorial · [1 sources] ·

A user reported that Anthropic's Opus 5.5 model took over 24 hours to complete a code refactoring task. The user noted that the model was set to maximum reasoning, and questioned if a lower setting would have been sufficient. This extended processing time was observed while attempting to simplify a large and over-engineered codebase. AI

IMPACT Highlights potential limitations in current LLM reasoning capabilities for complex, long-running tasks.

RANK_REASON User report on model performance, not an official release or benchmark.

Read on r/ClaudeAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic's Opus 5.5 struggles with lengthy code refactoring task

How we ranked this

Signal score
3 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
User report on model performance, not an official release or benchmark.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, infra
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AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/ClaudeAI TIER_2 English(EN) · /u/Suspicious_Pizza_946 ·

    Opus 5.5 running for more than 24 hours for a refactoring task

    <!-- SC_OFF --><div class="md"><p>I used opus 5.5 (max) and gpt 6.1 Sol (max) to write code for a problem for over a month. I made progress in solving the problem, but realised that the code base is super bloated, and looks over engineered. </p> <p>Then yesterday i asked opus 5.5…

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