Open-Source Ornith-1.5 Matches Claude Opus in Reasoning and Coding
aftahi_ai · x · 2026-08-19
The Ornith-1.5 family of open-source models has been released, featuring 9B Dense, 35B MoE, and 397B MoE variants. Trained with end-to-end self-improvement strategies, it claims performance comparable to Claude Opus 4.8 across reasoning, agentic, and coding tasks.
Key benchmarks:
- Terminal-Bench 2.1: 86.1
- SWE-Bench (verified): 86
- DeepSWE: 56
- Tool Decathlon: 71.2
The model achieves a more complete self-improvement loop by extending self-scaffolding strategies from Ornith-1.0.
Related event: Ornith-1.5 Release: 397B MoE Self-Improvement Targets Claude Opus(24 posts)→
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