Claude 3.5 Sonnet vs Hy3 Preview

Pick Hy3 Preview if you want the stronger benchmark profile. Claude 3.5 Sonnet only becomes the better choice if knowledge is the priority or you would rather avoid the extra latency and token burn of a reasoning model.

Hy3 Preview is clearly ahead on the provisional aggregate, 62 to 41. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Hy3 Preview's sharpest advantage is in coding, where it averages 60 against 49. The single biggest benchmark swing on the page is GPQA, 59.4% to 87.2%. Claude 3.5 Sonnet does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.

Claude 3.5 Sonnet is also the more expensive model on tokens at $3.00 input / $15.00 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 Claude 3.5 Sonnet 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 200K for Claude 3.5 Sonnet.