Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.5
91
Hy3 Preview
62
Verified leaderboard positions: GPT-5.5 #3 · Hy3 Preview unranked
Pick GPT-5.5 if you want the stronger benchmark profile. Hy3 Preview only becomes the better choice if coding is the priority or you want the cheaper token bill.
Agentic
+27.1 difference
Coding
+1.4 difference
Knowledge
+19.7 difference
GPT-5.5
Hy3 Preview
$5 / $30
$0 / $0
N/A
N/A
N/A
N/A
1M
256K
Pick GPT-5.5 if you want the stronger benchmark profile. Hy3 Preview only becomes the better choice if coding is the priority or you want the cheaper token bill.
GPT-5.5 is clearly ahead on the provisional aggregate, 91 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5's sharpest advantage is in agentic, where it averages 81.5 against 54.4. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 82% to 54.4%. Hy3 Preview does hit back in coding, so the answer changes if that is the part of the workload you care about most.
GPT-5.5 is also the more expensive model on tokens at $5.00 input / $30.00 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. GPT-5.5 gives you the larger context window at 1M, compared with 256K for Hy3 Preview.
GPT-5.5 is ahead on BenchLM's provisional leaderboard, 91 to 62. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 82% and 54.4%.
GPT-5.5 has the edge for knowledge tasks in this comparison, averaging 66.4 versus 46.7. Inside this category, HLE is the benchmark that creates the most daylight between them.
Hy3 Preview has the edge for coding in this comparison, averaging 60 versus 58.6. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
GPT-5.5 has the edge for agentic tasks in this comparison, averaging 81.5 versus 54.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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