Open model from Paper Instruments, fine-tuned from GLM-5.3 Flash for finance, law, consulting and operations work.
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Ultramarine 1 Flash is a language model from Paper Instruments, built on GLM-5.3 Flash as its base and tuned for professional knowledge work in finance, law, consulting and operations. Tasks include producing finished Excel workbooks, PowerPoint decks and Word documents, and working inside live business systems such as ERP and MES.
Paper Instruments reports a score of 62.9 on one of its benchmark charts and describes the model as "Fable-class" at roughly 60x lower cost. It cites $0.13 per task on its internal PI Knowledge Work benchmark, and says the model uses 6.5% fewer tokens than GLM-5.3 Flash. These figures come from the vendor's own benchmark, which it says correlates with the Artificial Analysis Intelligence Index (r = 0.81). They have not been independently verified. A YouTube creator noted they could not benchmark it because it was not yet on OpenRouter.
It is accessed through the Ultramarine API. A YouTube creator reports pricing of $0.15 per million input tokens and $0.50 per million output tokens, and the vendor says API pricing matches GLM-5.3 Flash. The vendor calls it an open model, but the provided material does not confirm the weights' location or license.
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Open-weight model claimed to match Fable class on knowledge work at 60x lower cost. Pricing is $0.15 input and $0.50 output per million tokens. The creator couldn't benchmark it because it wasn't on OpenRouter yet.
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