GPT-5.2 Codex
Code-specialist GPT for repository edits, reviews, and long-running software agents
BENCHMARKS
Not in the Epoch Capabilities Index. Epoch benchmarks what it can run, so this is a gap in coverage, not a poor result.
From the lab
Launch announcement · Dec 18, 2025Introducing GPT-5.2-CodexRELEASE DATEDec 11, 2025
WEIGHTSClosed weights
CONTEXT WINDOW400K
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, pdf
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.