Paper Instruments

Ultramarine 1 Flash: Scaling Non-Verifiable RL

Paper Instruments presents Ultramarine 1 Flash, an agentic model for professional knowledge work trained with large-scale reinforcement learning on GLM-5.3 Flash. It improves averages across six knowledge-work benchmarks while generating fewer tokens, and costs about $0.13 per task on their internal suite.

Research · AI · LLMs · Research · Benchmarks