GLM-5.2 vs GPT-5.6 Sol

Head-to-head technical comparison of intelligence, capabilities, and API pricing.

GLM-5.2

Z.ai

AI Mastery Index91.5

LMSYS Arena1465

Technical (MMLU-Pro)91.2%

Cost per 1M Tokens$1.4

GPT-5.6 Sol

OpenAI

AI Mastery Index95.7

LMSYS Arena1485

Technical (MMLU-Pro)95.1%

Cost per 1M Tokens$5

Architect's Verdict

When comparing GLM-5.2 and GPT-5.6 Sol, GPT-5.6 Sol edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, GLM-5.2 offers a more economical API at $1.4 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.