Name: GPT-5.6 Terra Pro
Author: OpenAI

GPT-5.6 Terra Pro

OpenAI · 2026-07-09

GPT-5.6 Terra Pro is the higher-compute Pro variant of GPT-5.6 Terra, represented as a distinct Atlas model so benchmark results reported under the Pro identity are not collapsed into standard Terra. OpenAI exposes Pro through the gpt-5.6-terra API model with reasoning.mode set to pro rather than through a separate API model ID.

Benchmark scores

Benchmark	Score
AHK-Eval	86.1
AHK-Eval Algorithms	66.7
AHK-Eval Data Structures	83.3
AHK-Eval Date and Time	83.3
AHK-Eval Easy	91.7
AHK-Eval Hard	66.7
AHK-Eval Hidden Cases	89.5
AHK-Eval Mid	100.0
AHK-Eval Numbers	100.0
AHK-Eval Parse Success	100.0
AHK-Eval Regex	83.3
AHK-Eval Strings	100.0
BuseyBench SVG	6.5
CadQueryEval	72.0
CadQueryEval — Bounding Box	88.0
CadQueryEval — Chamfer Distance	88.0
CadQueryEval — Code Execution	92.0
CadQueryEval — Component Count	92.0
CadQueryEval — Hausdorff 95p	80.0
CadQueryEval — STL Creation	92.0
CadQueryEval — Volume	88.0
CadQueryEval — Watertight Mesh	84.0
Capability	162.8
Eval Connections	100.0
Eval Connections — Guess Accuracy	97.6
GeneBench-Pro	28.5
GeneBench-Pro Artificial Analysis Subset	17.6
GeneBench-Pro Externally Reviewed	27.3
GeneBench-Pro Not Externally Reviewed	30.6
GeneBench-Pro Public Release Subset	36.0