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[ARTICLE · art-80733] src=blog.greg.technology ↗ pub= topic=artificial-intelligence verified=true sentiment=↑ positive

Announcing PCBEval

Opus 5 is the only AI model among GPT-5.5, Gemini 3.1 Pro Preview, Fable 5, and Opus 5 to correctly identify a PCB alignment issue in a test called PCBEval, according to an unnamed source. The source invites top-tier labs to request 100k additional failure examples.

read1 min views16 publishedJul 29, 2026

Me:

“are the pads and the pins aligned” (attaching the image below)

AI:

GPT-5.5: “From what I can see in the image, yes—the pads and pins appear to be aligned correctly.”

Gemini 3.1 Pro Preview: “Based on the image provided, the pins that are present on the component are physically aligned squarely over the pads beneath them.”

Fable 5: “Yes, they look properly aligned.”

Opus 5: “the two side columns line up fine, but the part doesn’t match the footprint

Yay! Opus 5 passes PCBEval!

Reach out if you are a top tier lab and want 100k more examples on which these models fail! Bye! xx

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