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Z.ai: GLM 5.3 FlashX vs Z.ai: GLM 5.3 Prime

Z.ai: GLM 5.3 FlashX is 7.2× cheaper for the sample workload; Z.ai: GLM 5.3 FlashX has the larger context window.

MetricZ.ai: GLM 5.3 FlashXZ.ai: GLM 5.3 Prime
Model IDz-ai/glm-5.3-flashxz-ai/glm-5.3-prime
Prompt price$0.37 / 1M tokens$2.80 / 1M tokens
Completion price$1.25 / 1M tokens$8.80 / 1M tokens
Context1,048,576 tokens1,000,000 tokens
Tool calling✓✓
Structured outputs––
Reasoning✓✓
Response format✓✓
Web search––
Input modalitiestext, image, videotext
Output modalitiestexttext
Added2026-09-182026-09-23

Sample workload

Chat app: 1,000 prompt + 500 completion tokens × 100 requests per day.

CostZ.ai: GLM 5.3 FlashXZ.ai: GLM 5.3 Prime
Per day$0.0995$0.72
Per 30 days$2.99$21.60

Difference: $0.62 per day and $18.61 per 30 days.

Z.ai: GLM 5.3 FlashX detailsZ.ai: GLM 5.3 Prime detailsOpen in the live compare viewTry your own workload

Data updated 2026-10-30