Ornith-1.5 open-source family launches, 397B MoE claims Claude Opus 4.8 parity
KokaOP · reddit · 2026-08-19
Ornith-1.5 is a family of open-source LLMs in 9B Dense, 35B MoE, and 397B MoE variants, trained with self-improving strategies.
The team claims SOTA among comparable open-source models, with the 397B version delivering performance comparable to Claude Opus 4.8 across reasoning, agentic, and coding tasks: Terminal-Bench 2.1 at 86.1, SWE-Bench Verified 86 / Pro 65.1 / Multilingual 79.6, DeepSWE 56, HLE 44.6, ClawEval 81.4, and Tool Decathlon 71.2. Available on Hugging Face.
Related event: Ornith-1.5 Release: 397B MoE Self-Improvement Targets Claude Opus(24 posts)→
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