Claude Sonnet 5 vs GLM-5.3-Flash: scores, price and which to pick

Add a model

Our take

GLM-5.3-Flash wins 4 of 4 categories and costs less: 16.8× cheaper for everyday text work. Easy pick.

Overall5355Best

Coding5569Best

Writing5364Best

Support5667Best

Value4360Best

Input / 1M$2.00$0.15Best

Output / 1M$10.00$0.50Best

Blended / 1M$4.00$0.24Best

Context window1M1M

Open weightsNoYes

Released29 Jun 202626 Aug 2026

Your monthly bill

Tasks per month50k

Claude Sonnet 5$800

GLM-5.3-Flash$47.50Cheapest

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