GPT-5.2 Pro
Higher-accuracy GPT-5.2 variant for tougher reasoning and review workflows
ECI STANDING#23 of 266
SCORE155.38153.18–158.22 CI
FRONTIER LAGLaunched in the leadNothing released before it had scored higher.
SCORES LIKE THESE MODELSMuse Spark 1.2Meta AI · Aug 2026155.48DeepSeek V4 Pro 0813DeepSeek · Aug 2026155.47Claude Opus 4.6Anthropic · Feb 2026155.34GLM-5.3Z.ai (Zhipu AI) · Aug 2026155.25
Full Epoch Capabilities Index ranking ↗RELEASE DATEDec 11, 2025
WEIGHTSClosed weights
CONTEXT WINDOW400K
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.