Tag archive

Petri

Everything we’ve published under Petri so far.

Follow this lane

1 Useful Machines post on Petri

Petri readers are already filtering for a specific AI topic, which makes this archive a useful audience signal for sponsors and repeat readers.

2026-05-08 By Mara Vale 5 min read

Anthropic handed Petri to Meridian. Now the evals need to earn trust.

Petri 3.0 turns Anthropic’s open alignment-testing tool into a more hackable, more realistic eval stack under Meridian Labs. Useful, if buyers treat it as a test harness instead of a trust sticker.

Anthropic Petri Meridian Labs AI Evaluation Alignment AI Safety