Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.4 Pro
90
Sakana Fugu Ultra
100
Pick Sakana Fugu Ultra if you want the stronger benchmark profile. GPT-5.4 Pro only becomes the better choice if agentic is the priority or you need the larger 1.05M context window.
Agentic
+7.2 difference
Knowledge
+46.5 difference
GPT-5.4 Pro
Sakana Fugu Ultra
$30 / $180
$5 / $30
74 t/s
N/A
151.79s
N/A
1.05M
1M
Pick Sakana Fugu Ultra if you want the stronger benchmark profile. GPT-5.4 Pro only becomes the better choice if agentic is the priority or you need the larger 1.05M context window.
Sakana Fugu Ultra is clearly ahead on the provisional aggregate, 100 to 90. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Sakana Fugu Ultra's sharpest advantage is in knowledge, where it averages 95.5 against 49. GPT-5.4 Pro does hit back in agentic, so the answer changes if that is the part of the workload you care about most.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $5.00 input / $30.00 output per 1M tokens for Sakana Fugu Ultra. That is roughly 6.0x on output cost alone. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 1M for Sakana Fugu Ultra.
Sakana Fugu Ultra is ahead on BenchLM's provisional leaderboard, 100 to 90.
Sakana Fugu Ultra has the edge for knowledge tasks in this comparison, averaging 95.5 versus 49. GPT-5.4 Pro stays close enough that the answer can still flip depending on your workload.
GPT-5.4 Pro has the edge for agentic tasks in this comparison, averaging 89.3 versus 82.1. Sakana Fugu Ultra stays close enough that the answer can still flip depending on your workload.
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