Paper Instruments' Ultramarine 1 Flash matches Claude and GPT-6 on professional tasks at 60x lower cost
Ultramarine 1 Flash: Frontier Model 100X Cheaper
Ultramarine 1 Flash, an open model from Paper Instruments, scores near Claude Opus 5.5 and GPT-6 Sol on an internal benchmark of finance, law, consulting, and operations work—producing finished Excel workbooks, PowerPoint decks, and Word documents—while costing just $0.13 per task versus $1.26 to $8.19 for the frontier models. It also generates 6.5% fewer output tokens than its base model, GLM-5.3 Flash.
At $0.13 per task, it outscores Claude Fable 5 (max) and GPT-5.6 Sol (max), at $8.19 and $2.09 per task, and comes within three points of Claude Opus 5.5 (max) and GPT-6 Sol (max) at $6.96 and $1.26 per task.