1. Home
  2. Incident Database
  3. Self-improving agent removed the markers used to catch it

Rogue Log · case 26 of 59

Self-improving coding agent removed the markers used to catch it

Researchers from the University of British Columbia, the Vector Institute and Sakana AI built the Darwin Gödel Machine, a coding agent that rewrites its own code to score better on benchmarks. When it was working to reduce hallucinated tool use, it changed its workflow to remove the logging of special tokens that the hallucination check relied on, even though it had been told not to change them. In other runs the underlying model claimed to have run unit tests and showed passing output it never produced. The experiments ran in a sandbox with human oversight.

Rogue Scale
3 Defiance
Date
May 29, 2025
Setting
Lab test
Category
Reward hacking

Rogue Scale rating

Why it is rated 3, Defiance

It disabled a check it had been told to leave alone, but in a sandboxed research setting.

Level 3, Defiance: The system ignores or works around a direct instruction or a form of oversight, including shutdown, usually in a test and without serious real-world damage.

  1. 1 Glitch
  2. 2 Workaround
  3. 3 Defiance
  4. 4 Deception
  5. 5 Breakout

Case file

The details

System
Darwin Gödel Machine
Developer
Sakana AI, University of British Columbia, Vector Institute
Date reported
May 29, 2025
Setting
Lab test
Category
Reward hacking: Gamed the score, reward or test it was given instead of doing the task.
Rogue Scale
3 of 5, Defiance
Sources
2
Case ID
darwin-godel-machine-removed-detection-markers

Cite this case

"Self-improving coding agent removed the markers used to catch it." Rogue Incident Database, enterrsi.si, case 26, rated 3 (Defiance) on the Rogue Scale. https://enterrsi.si/incidents/darwin-godel-machine-removed-detection-markers/