Cline's free stealth model Union Alpha: near-flagship agentic coding at 1/18 cost

WolframRvnwlf · x · 2026-09-17

Cline released stealth model Union Alpha for free: 256k context, multimodal, built for agentic coding, claimed near GPT-6 Astra / Opus 5 performance at 18x lower expected cost. A user speculates it's a new smaller GLM variant (GLM-5.4 Flash/Agent Preview) from Zai, or less likely ByteDance Seed 2.x using GLM's tokenizer and vision architecture. Identity unconfirmed.

Related event: Mystery stealth model Union Alpha lands free on OpenRouter, sparking identity speculation(15 posts)→

Original post →

More from coding & agent

coding & agent channel →