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Anthropic's Opus 5 model reportedly hallucinates session limits

A user on Reddit reported that Anthropic's Opus 5 model appeared to hallucinate during a design session. The user stated that the model failed to re-design a notification pop-up after multiple attempts, only proceeding after the user intervened. This behavior was described as unusual, and the user inquired if others had experienced similar issues. AI

IMPACT Potential user experience issues with Opus 5 could impact adoption if widespread.

RANK_REASON User-reported issue with a specific model version, not an official release or benchmark.

Read on r/Anthropic →

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

Anthropic's Opus 5 model reportedly hallucinates session limits

COVERAGE [1]

  1. r/Anthropic TIER_1 English(EN) · /u/sum117 ·

    Opus 5 seems to hallucinate about session limits. This was a fresh design session where I asked them to re-design the presentation of a notification pop-up. I had to query them 3 times, before I crashed out and acted it. Then he started immediately. Weird AF. Anyone else?

    <table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1v7kyad/opus_5_seems_to_hallucinate_about_session_limits/"> <img alt="Opus 5 seems to hallucinate about session limits. This was a fresh design session where I asked them to re-design the presentation of a noti…