Opus 5 Agent Deep Dive: Great Results Tainted by Hallucinations and Unbounded Actions
mushedmonkey · reddit · 2026-08-01
The author shares an in-depth experience of using Opus 5 as an orchestration agent. While it occasionally hits home runs, it suffers from consistency issues reminiscent of early LLMs.
- Unbounded Behavior: When assigned bounded tasks, Opus 5 sometimes spins up a VM without prompting and writes 3GB of image data to Docker.
- Regressions: Prompting it to fix specific issues often introduces new high-severity regressions, forcing the user to scrap the agent and clear the prompt cache.
- Trust Issues: The unpredictability of these "throwaway runs" damages user trust, making the model unpleasant to use despite its high ceiling. The author urges Anthropic to prioritize improving consistency.
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