Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.4 mini
71
Hy3 Preview
62
Pick GPT-5.4 mini if you want the stronger benchmark profile. Hy3 Preview only becomes the better choice if you want the cheaper token bill.
Agentic
+11.2 difference
Knowledge
+10.7 difference
GPT-5.4 mini
Hy3 Preview
$0.75 / $4.5
$0 / $0
201 t/s
N/A
3.85s
N/A
400K
256K
Pick GPT-5.4 mini if you want the stronger benchmark profile. Hy3 Preview only becomes the better choice if you want the cheaper token bill.
GPT-5.4 mini is clearly ahead on the provisional aggregate, 71 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4 mini's sharpest advantage is in agentic, where it averages 65.6 against 54.4. The single biggest benchmark swing on the page is HLE, 41.5% to 25.5%.
GPT-5.4 mini is also the more expensive model on tokens at $0.75 input / $4.50 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-5.4 mini gives you the larger context window at 400K, compared with 256K for Hy3 Preview.
GPT-5.4 mini is ahead on BenchLM's provisional leaderboard, 71 to 62. The biggest single separator in this matchup is HLE, where the scores are 41.5% and 25.5%.
GPT-5.4 mini has the edge for knowledge tasks in this comparison, averaging 57.4 versus 46.7. Inside this category, HLE is the benchmark that creates the most daylight between them.
GPT-5.4 mini has the edge for agentic tasks in this comparison, averaging 65.6 versus 54.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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