Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.5
91
Interfaze Beta
76
Verified leaderboard positions: GPT-5.5 #3 · Interfaze Beta unranked
Pick GPT-5.5 if you want the stronger benchmark profile. Interfaze Beta only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
Knowledge
+23.5 difference
Multimodal
+0.7 difference
GPT-5.5
Interfaze Beta
$5 / $30
$1.5 / $3.5
N/A
N/A
N/A
N/A
1M
1M
Pick GPT-5.5 if you want the stronger benchmark profile. Interfaze Beta only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
GPT-5.5 is clearly ahead on the provisional aggregate, 91 to 76. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 is also the more expensive model on tokens at $5.00 input / $30.00 output per 1M tokens, versus $1.50 input / $3.50 output per 1M tokens for Interfaze Beta. That is roughly 8.6x on output cost alone.
GPT-5.5 is ahead on BenchLM's provisional leaderboard, 91 to 76. The biggest single separator in this matchup is MMMU-Pro, where the scores are 81.2% and 71.1%.
Interfaze Beta has the edge for knowledge tasks in this comparison, averaging 89.9 versus 66.4. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Interfaze Beta has the edge for multimodal and grounded tasks in this comparison, averaging 71.1 versus 70.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
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