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GPT-6.1 Sol vs GLM-5.3

GPT-6.1 SolOpenAI
GLM-5.3Z.ai
Our take

GPT-6.1 Sol and GLM-5.3 trade wins evenly on our provisional scores, but GLM-5.3 is 1.9× cheaper for everyday text work. Pick GPT-6.1 Sol when quality matters most, GLM-5.3 at volume.

Overall74Best61
Coding78Best68
Writing5870Best
Support5867Best
Value64Best54
Input / 1M$2.00$1.40Best
Output / 1M$10.00$4.40Best
Blended / 1M$4.00$2.15Best
Context window1.1MBest1M
Open weightsNoYes
Released29 Sept 202614 Aug 2026

Your monthly bill

50k
GPT-6.1 Sol$800
GLM-5.3$430Cheapest
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.