Atlas

Models

← All models

GPT-5.2-Codex

OpenAI · 2025-12-18

GPT-5.2-Codex is OpenAI's GPT-5.2 variant optimized for long-horizon agentic coding and project-scale changes such as refactors and migrations. The release also improves Windows and vision performance and adds substantially stronger cybersecurity capabilities.

Benchmark scores

BenchmarkScore
AA-LCR75.7
AA-LCR v1.182.3
AA-Omniscience Index-2.2
ALE-Bench1686
APEX-Agents27.2
APEX-SWE30.8
Arena Code WebDev — Brand & Marketing1355
Arena Code WebDev — Consumer Product1341
Arena Code WebDev — Content Creation Tools1340
Arena Code WebDev — Data & Analytics1345
Arena Code WebDev — Frontend1338
Arena Code WebDev — Gaming1328
Arena Code WebDev — HTML1348
Arena Code WebDev — React1329
Arena Code WebDev — Reference-Based Design1347
Arena Code WebDev — Simulations1331
Artificial Analysis Omniscience Accuracy41.1
Artificial Analysis Omniscience Hallucination Rate73.4
Artificial Analysis Progress Index v1290
BullshitBench v2 Leaderboard45.0
BuseyBench SVG5.2
Capability153.2
CritPt (avg@5)8.7
EnterpriseBench: CoreCraft20.1
GBENCH One-shot Coding GScore31.7
GPQA Diamond (Artificial Analysis avg@5)89.9
Humanity's Last Exam (Text-Only)35.7
IFBench (Artificial Analysis avg@5)77.6
LiveBench74.0
LiveBench Agentic Coding Average49.4
Loading Atlas data…