The official home of the world’s most extensive mainframe modernization suite

vs generic LLMs

A guess at scale
is still a guess.

Ask a general-purpose model to extract business rules from production COBOL and it answers fluently, confidently — and, in our benchmark, correctly about 30% of the time. Charm is not lineage.

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CONFIDENT · ≈30% CORRECTGENERIC LLMYOUR SOURCE · IN PLACERULE-1040L.10412–10434RULE-1053L.10803–10825RULE-1066L.11194–11216RULE-1079L.11585–11607RULE-1092L.11976–11998RULE-1105L.12367–12389RULE-1118L.12758–12780RULE-1131L.13149–13171≈0% · LINEAGE 100%PALM ARK

The model rolls.
Seven of ten come up wrong.

Every Palm rule carries
the address it came from.

The difference

Liability with good grammar

The difference isn’t the model — it’s the method. A chat window samples from a distribution; it cannot show its work, and it answers differently tomorrow. In a regulated cutover, an unsourced answer is not an answer. It’s a liability with good grammar.

Palm Ark is deterministic: the same code yields the same extraction, every time, across 50,000+ lines in a single pass — and every rule arrives with the exact source lines attached, around 95% accurate in benchmark against ~30% for generic LLMs. Your auditors don’t have to trust the AI. They can check it.

Benchmark us against any model.

Run the benchmark