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Knowing when to stop is hard for language models controlling a robot arm ➤ Claude Opus 5.5 completed the task in 23 minutes, and said so: "The crocodile looks fully inside now" ➤ It then spent 22 minutes pushing the crocodile back and forth, only to finish almost exactly where it was before
- Who
- Artificial Analysis
- What
- reported Claude Opus 5.5’s performance controlling a robot arm, including continued movement after completing the task
- Quote
Claude Opus 5.5 completed the task in 23 minutes, and said so: "The crocodile looks fully inside now"
Read next
See the full storyClaude Opus 5.5 Kept Moving a Robot Arm After Completing Its TaskKnowing when to stop is hard for language models controlling a robot arm
➤ Claude Opus 5.5 completed the task in 23 minutes, and said so: "The crocodile looks fully inside now"
➤ It then spent 22 minutes pushing the crocodile back and forth, only to finish almost exactly where it was before
The story so far
Artificial Analysis reported that Claude Opus 5.5 completed a robot-arm task in 23 minutes, then spent another 22 minutes pushing a crocodile back and forth until it was almost where it started. The model said, “The crocodile looks fully inside now” before continuing to move it.
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