GPT-5.3 Codex vs GPT-5.4 Nano — Who Actually Wins? Real Benchmark Data (2026)

head to head

GPT-5.3 Codex vs GPT-5.4 Nano

4 shared benchmarks

4

wins

0

ties

0

wins

91.5%

GPQA Diamond

82.8%

64.0%

OSWorld

39.0%

56.8%

SWE-bench Pro

52.4%

77.3%

Terminal-Bench 2.0

46.3%