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GPT-5.2 Pro

ECI#23
155
OpenAI
Dec. 11, 2025
Closed weights

GPT-5.2 Pro is a closed-weights model from OpenAI, released December 11, 2025. It has an ECI score of 155 and ranks 23rd of 249 tracked models. At the time of its release, it ranked 1st of 176 tracked models.

GPT-5.2 Pro vs select alternatives

DomainBenchmark
GPT-5.2 Pro
OpenAI
Dec. 11, 2025
Closed weights
GPT-5 Pro
OpenAI
Oct. 7, 2025
Closed weights
Gemini 3 Pro
Google DeepMind
Nov. 18, 2025
Closed weights
Claude Opus 4.5
Anthropic
Nov. 24, 2025
Closed weights
ECI scoreBest score 166
155150153150
Ranking#23#43#35#45
Conceptual reasoning
SimpleBenchBest score 82%
57%
62%
76%
62%
ARC-AGI-2Best score 95%
54%
18%
31%
38%
ARC-AGI-1Best score 99%
91%
70%
75%
80%
Mathematics
FrontierMath Tiers 1-3 (v2)Best score 94%
74%
56%
n/a
34%
FrontierMath Tier 4 (v2)Best score 98%
46%
20%
n/a
5%

Model metadata

General
OrganizationOpenAI
Release dateDec. 11, 2025
Model accessibilityClosed weights
CountryUnited States of America
Knowledge cutoffUnknown
Provider notesopenai.com
Pricing
Input price$21 / 1M tokens
Output price$168 / 1M tokens
Training
ParametersUnknown
Training computeUnknown
Training hardwareUnknown
Training timeUnknown
Training dataset sizeUnknown