Hy3 Preview vs Qwen3.5 397B

Pick Qwen3.5 397B if you want the stronger benchmark profile. Hy3 Preview only becomes the better choice if you want the cheaper token bill or you need the larger 256K context window.

Qwen3.5 397B has the cleaner provisional overall profile here, landing at 64 versus 62. It is a real lead, but still close enough that category-level strengths matter more than the headline number.

Qwen3.5 397B's sharpest advantage is in instruction following, where it averages 92.6 against 63.1. The single biggest benchmark swing on the page is HLE, 25.5% to 28.7%.

Qwen3.5 397B is also the more expensive model on tokens at $0.60 input / $3.60 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Hy3 Preview. That is roughly Infinityx on output cost alone. Hy3 Preview is the reasoning model in the pair, while Qwen3.5 397B is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Hy3 Preview gives you the larger context window at 256K, compared with 128K for Qwen3.5 397B.