Open-source Ornith-1.5 released under MIT, claims Claude Opus-level performance
iamfakhrealam · x · 2026-08-19
The Ornith-1.5 family of open-source LLMs has been released, featuring 9B Dense, 35B MoE, and 397B MoE variants under the MIT license. Trained with self-improving strategies, the models claim state-of-the-art performance among open weights and parity with Claude Opus 4.8 on reasoning, agentic, and coding tasks. Reported benchmarks include Terminal-Bench 2.1 (86.1) and SWE-Bench (86 verified).
Related event: Ornith-1.5 Release: 397B MoE Self-Improvement Targets Claude Opus(24 posts)→
More from Models
- GLM 5.5 rumored to drop soon, coding ability expected to match frontier models — bindureddy · 2026-10-16
- Five rounds of adversarial prompting make Opus 5.5 and Argon converge on identical output — LanceCharger · 2026-10-16
- DIY benchmark ranks 18 models on subjective judgments, GLM-5.3 tops consensus match — arkuto · 2026-10-16
- Bindu Reddy: Google's Argon excels at complex doc writing at half the cost of Opus — bindureddy · 2026-10-16
- MAI-2 is 2x bigger than V4-Pro while V4.1F is 3x smaller: Microsoft's scaling ladder questioned — teortaxesTex · 2026-10-16
- Step 5 Preview hits DeepInfra day-zero: 600B MoE, 1M context, $1/M input tokens — StepFun_ai · 2026-10-16