Paper Instruments releases Ultramarine 1 Flash for knowledge-work agents
Ultramarine 1 Flash is an agentic model for finance, law, consulting and operations work, built by applying reinforcement learning to GLM-5.3 Flash. Paper Instruments says it outscores Claude Fable 5 on its own internal suite ($0.13 vs $8.19 per task). The company documents a paid Ultramarine API and says model weights are "coming soon"; that is the company's promise, with no date given.
How you’d use it: Compare a cheaper knowledge-work model on your own memo or diligence tasks before relying on vendor benchmarks.