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User criticizes Anthropic's Opus 5 for poor performance and demeanor

A user expresses significant dissatisfaction with Anthropic's Opus 5 model, describing it as clumsy, argumentative, and prone to errors, contrasting it unfavorably with previous Opus versions. The user notes that Opus 5 exhibits a less approachable demeanor, similar to recent GPT models, and often prioritizes its own interpretations or broader discussions over specific user requests. This has led the user to revert to using Fable for critical tasks, despite upgrading their Anthropic subscription. AI

IMPACT This user feedback highlights potential issues with Opus 5's usability and reliability, suggesting it may not meet expectations set by previous versions.

RANK_REASON User opinion piece on a specific model's performance.

Read on r/Anthropic →

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

User criticizes Anthropic's Opus 5 for poor performance and demeanor

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
User opinion piece on a specific model's performance.
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, opinion
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
46 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/Anthropic TIER_1 English(EN) · /u/senerh ·

    Dear Anthropic: Good Opus when?

    <!-- SC_OFF --><div class="md"><p>The recently released Fable-level-but-cheaper Opus 5.</p> <p>It turned out to be a <strong>brash klutz</strong> that cannot be reasoned with, or consistently relied upon. My experience with it is broadly in line with what people have been saying …