Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.4 nano
59
o1
57
Pick GPT-5.4 nano if you want the stronger benchmark profile. o1 only becomes the better choice if knowledge is the priority.
Knowledge
+22.5 difference
GPT-5.4 nano
o1
$0.2 / $1.25
$15 / $60
191 t/s
98 t/s
3.64s
32.29s
400K
200K
Pick GPT-5.4 nano if you want the stronger benchmark profile. o1 only becomes the better choice if knowledge is the priority.
GPT-5.4 nano has the cleaner provisional overall profile here, landing at 59 versus 57. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
o1 is also the more expensive model on tokens at $15.00 input / $60.00 output per 1M tokens, versus $0.20 input / $1.25 output per 1M tokens for GPT-5.4 nano. That is roughly 48.0x on output cost alone. GPT-5.4 nano gives you the larger context window at 400K, compared with 200K for o1.
GPT-5.4 nano is ahead on BenchLM's provisional leaderboard, 59 to 57. The biggest single separator in this matchup is GPQA, where the scores are 82.8% and 75.7%.
o1 has the edge for knowledge tasks in this comparison, averaging 75.7 versus 53.2. Inside this category, AA-Omniscience Index is the benchmark that creates the most daylight between them.
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