Grok 4.20 vs Hy3 Preview

Pick Grok 4.20 if you want the stronger benchmark profile. Hy3 Preview only becomes the better choice if agentic is the priority or you want the cheaper token bill.

Grok 4.20 has the cleaner provisional overall profile here, landing at 65 versus 62. It is a real lead, but still close enough that category-level strengths matter more than the headline number.

Grok 4.20's sharpest advantage is in coding, where it averages 61 against 60. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 47.1% to 54.4%. Hy3 Preview does hit back in agentic, so the answer changes if that is the part of the workload you care about most.

Grok 4.20 is also the more expensive model on tokens at $2.00 input / $6.00 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. Grok 4.20 gives you the larger context window at 2M, compared with 256K for Hy3 Preview.