LIVE INTELLIGENCE · part of the Xentir AI Index

GLM-5.1 vs GPT-5 Pro

GLM-5.1 · Z.ai (Zhipu AI), released 2026-04-07
GPT-5 Pro · OpenAI, released 2025-10-07

“Epoch AI, 'AI Benchmarking Hub'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource].” · epoch.ai/benchmarks · Licensed CC BY 4.0 · data last verified 2026-07-26 · Methodology · Data Sources

Head-to-head

Measured on 2 of 9 tracked benchmarks for both models — GLM-5.1 leads on 1, GPT-5 Pro leads on 1.

Benchmark	GLM-5.1	GPT-5 Pro	Leads
Epoch Capabilities Index (ECI)	150.4	150.4	GLM-5.1
SWE-bench Verified	0.742	Not measured	Not measured on both
GPQA Diamond	0.855	Not measured	Not measured on both
MATH Level 5	Not measured	Not measured	Not measured on both
OTIS Mock AIME 2024-2025	0.922	Not measured	Not measured on both
FrontierMath	0.334	Not measured	Not measured on both
FrontierMath Tier 4	0.125	0.146 (high)	GPT-5 Pro
SimpleQA Verified	0.373	Not measured	Not measured on both
Chess Puzzles	0.180	Not measured	Not measured on both

Benchmark results measure specific tasks and should not be treated as a universal measure of model quality. A model with no row here for a benchmark has not been measured on it — that is left blank, never estimated.

Full profiles

GLM-5.1 → · GPT-5 Pro → · the full AI Model Rankings table