Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.5 Pro
100
Sakana Fugu Ultra
100
Treat this as a split decision. GPT-5.5 Pro makes more sense if agentic is the priority; Sakana Fugu Ultra is the better fit if knowledge is the priority or you want the cheaper token bill.
Agentic
+8.0 difference
Knowledge
+38.3 difference
GPT-5.5 Pro
Sakana Fugu Ultra
$30 / $180
$5 / $30
N/A
N/A
N/A
N/A
1M
1M
Treat this as a split decision. GPT-5.5 Pro makes more sense if agentic is the priority; Sakana Fugu Ultra is the better fit if knowledge is the priority or you want the cheaper token bill.
GPT-5.5 Pro and Sakana Fugu Ultra finish on the same provisional overall score, so this is less about a single winner and more about where the edge shows up. The provisional headline says tie; the benchmark table is where the real choice happens.
GPT-5.5 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-5.5 Pro and Sakana Fugu Ultra are tied on the provisional overall score, so the right pick depends on which category matters most for your use case.
Sakana Fugu Ultra has the edge for knowledge tasks in this comparison, averaging 95.5 versus 57.2. GPT-5.5 Pro stays close enough that the answer can still flip depending on your workload.
GPT-5.5 Pro has the edge for agentic tasks in this comparison, averaging 90.1 versus 82.1. Sakana Fugu Ultra stays close enough that the answer can still flip depending on your workload.
For engineers, researchers, and the plain curious — a weekly brief on new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.