Coinbase says fine-tuned Qwen3.5-9B beats frontier models

Coinbase CEO Brian Armstrong said the company fine-tuned open-weight Qwen3.5-9B on internal data for fraud prevention, claiming it outperformed frontier model Opus 4.5 at lower cost and faster speed. The claim has drawn skepticism over the rigor of the evaluation.

2026-10-12 ~ 2026-10-12 · 2 related posts

• Coinbase fine-tuned Qwen3.5-9B on fraud data, beating Opus 4.5 at half the latency — J0se · 2026-10-12
• Coinbase CEO claims fine-tuned Qwen3.5-9B beat frontier models on fraud detection, drawing criticism — qinzytech · 2026-10-12