Ornith-1.5 open-source LLM family matches Claude Opus 4.8

Ornith-1.5 spans 9B dense, 35B MoE, and 397B MoE, trained via self-improvement. The 397B scores 86.1 on Terminal-Bench 2.1 and 56.0 on DeepSWE, on par with Claude Opus 4.8 (85.0 and 59.0).