ModelCap
Current AI model comparison
Exact identities · public evidence
OpenAI
GPT-5.5 Pro
Position
#52
Index
59.3
Measured
publisher-corpus-prior over 183 held-out anchors (59%); 1 specialist-board observation at 2.1% support (41%); shrunk 14.4 toward the measured corpus
Comparison side 1
Stepfun Ai
Step3 VL 10B
Position
#50
Index
60.0
Estimated
global-corpus-prior over 183 held-out anchors (17%); launch card against 2 resolved peers on 4 rows (83%); exceeds every named peer on 3 of 4 rows; no cross-lab optimism probe available; shrunk 1.4 toward the measured corpus
Comparison side 2
Output / 1M
$180
vs Unavailable
Context
1M
vs —
Weights
API only
vs Open weights