Ornith AI Releases: Ornith-1.5

ThursdAI — the weekly AI news podcast hosted by Alex Volkov — has covered one Ornith release so far: Ornith-1.5 on Aug 20, 2026. Ornith-1.5 family: open 397B MoE matches Opus 4.8 on Terminal-Bench 2.1. The entry below has primary-source links, key numbers and the episode where we covered it live.

1 release1 open weight1 episodecovered Aug 20, 2026

August 2026 1

Ornith
New ModelsOpen weights

Ornith-1.5

Ornith-1.5 family: open 397B MoE matches Opus 4.8 on Terminal-Bench 2.1

The Ornith-1.5 family ships as open source, self-improving models in three sizes: 9B dense, 35B MoE and 397B MoE. The 397B flagship matches Claude Opus 4.8 on Terminal-Bench 2.1 (86.1) and DeepSWE (56).

86.1 Terminal-Bench 2.1, matching Claude Opus 4.856 DeepSWE
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