GLM-5.3 Flash Matches Claude at 1/429th the Price in a YouTube Script Benchmark

OnlyProggingForFun · reddit · 2026-09-27

A YouTuber shares early results from an internal creative writing benchmark: models wrote full YouTube scripts for his channel — 10 real tasks, 5 scripts each — scored 0-100 by three AI judges against his own edited references.

GLM-5.3 Flash wrote a script for $0.0074 and scored 88.2; Claude Fable 5.1 at max effort scored 89.7 at $3.15 — a 429x price gap for 1.7% score difference, and plenty of pricier setups scored worse.

His real takeaway: he'd happily pay Fable money if it cut editing time, so the metric worth measuring yourself is blind-tested publishable-script count and minutes spent fixing, not raw scores.

Related event: Homegrown writing benchmark: GLM-5.3 Flash near top quality at tiny cost(2 posts)→

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