paper instruments released ultramarine 1 flash on oct 14, a post-train of glm-5.3 flash. over the base it gains 4.1 points on average across six knowledge-work benchmarks, with 6.5% fewer tokens. on their own suite, 59.3 at $0.13 a task vs claude fable 5 at max, 57.8 and $8.19.
Ultramarine 1 Flash: Scaling Non-Verifiable RL — Paper Instruments
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