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that mystery model everyone was using free last week? z.ai just revealed it — it’s GLM-5.3-Flash. $0.15 per million input, $0.50 output. opus 5 is $30 for the same volume. this is 65 cents. and it’s not a toy, artificial analysis scores it 57 on the intelligence index in a price tier where the median is 18. MIT license, weights on hugging face right now, 1M context, takes video. and the whole thing was trained and served on chinese chips, no nvidia. so the question isn’t whether it beats opus. it’s what you’re paying 46x more for. what are you actually running in production? #glm #opensourceai #anthropic #llm #ai