GPT-5.6 Terra vs GLM-5.3-Flash: scores, price and which to pick

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Our take

GLM-5.3-Flash wins 3 of 4 categories and costs less: 18.9× cheaper for everyday text work. Easy pick.

Overall60Best55

Coding5469Best

Writing5364Best

Support5767Best

Value5060Best

Input / 1M$2.00$0.15Best

Output / 1M$12.00$0.50Best

Blended / 1M$4.50$0.24Best

Context window1.1MBest1M

Open weightsNoYes

Released9 Jul 202626 Aug 2026

Your monthly bill

Tasks per month50k

GPT-5.6 Terra$900

GLM-5.3-Flash$47.50Cheapest

List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.