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GPT-5.6 Sol vs GLM-5.3-Flash

GPT-5.6 SolOpenAI
GLM-5.3-FlashZ.ai
Our take

GPT-5.6 Sol and GLM-5.3-Flash trade wins evenly on our provisional scores, but GLM-5.3-Flash is 33.7× cheaper for everyday text work. Pick GPT-5.6 Sol when quality matters most, GLM-5.3-Flash at volume.

Overall68Best55
Coding6769Best
Writing67Best64
Support6667Best
Value5460Best
Input / 1M$4.00$0.15Best
Output / 1M$20.00$0.50Best
Blended / 1M$8.00$0.24Best
Context window1.1MBest1M
Open weightsNoYes
Released9 Jul 202626 Aug 2026

Your monthly bill

50k
GPT-5.6 Sol$1.6k
GLM-5.3-Flash$47.50Cheapest
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.