GLM 5.3 vs GLM 5.3 Flash
Compare GLM 5.3 from Z.ai and GLM 5.3 Flash from Z.ai on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
Overview
Analysis
GLM 5.3 or GLM 5.3 Flash: which should you choose?
Choose GLM 5.3 for:
- a higher Intelligence Index (31.7 vs 27.8)
- a higher Coding Index (74.8 vs 71.5)
- a higher Agentic Index (53.1 vs 50.9)
- a quicker first token (0.37 s vs 0.63 s)
Choose GLM 5.3 Flash for:
- lower token prices
Artificial Analysis benchmark differences between GLM 5.3 and GLM 5.3 Flash
| Benchmark | GLM 5.3 | GLM 5.3 Flash | Difference |
|---|---|---|---|
| Intelligence Index | 31.7 +3.9 | 27.8 | GLM 5.3 +3.9 |
| Coding Index | 74.8 +3.3 | 71.5 | GLM 5.3 +3.3 |
| Agentic Index | 53.1 +2.2 | 50.9 | GLM 5.3 +2.2 |
GLM 5.3 vs GLM 5.3 Flash at a glance
| Attribute | GLM 5.3 | GLM 5.3 Flash |
|---|---|---|
| Input price | $0.0699/M tokens | $0.0399/M tokens |
| Output price | $1.40/M tokens | $0.0784/M tokens |
| Context window | 1,048,576 tokens | 1,048,576 tokens |
| Intelligence Index | 31.7 | 27.8 |
| Coding Index | 74.8 | 71.5 |
| Agentic Index | 53.1 | 50.9 |
| Latency (p50) | 0.37 s | 0.63 s |
| Throughput (p50) | 108.0 tok/s | 108.0 tok/s |
| Provided by | Z.ai | Z.ai |
| Model page | GLM 5.3 model details, providers and pricing | GLM 5.3 Flash model details, providers and pricing |
Benchmark data updated
Frequently asked questions
Is GLM 5.3 cheaper than GLM 5.3 Flash?
GLM 5.3 Flash is cheaper than GLM 5.3 on OpenRouter: GLM 5.3 Flash costs $0.0399/M tokens input and $0.0784/M tokens output, while GLM 5.3 costs $0.0699/M tokens input and $1.40/M tokens output.
Which has the longer context window, GLM 5.3 or GLM 5.3 Flash?
GLM 5.3 and GLM 5.3 Flash have the same context window of 1,048,576 tokens.
Which is faster, GLM 5.3 or GLM 5.3 Flash?
GLM 5.3 and GLM 5.3 Flash generate at the same median throughput on OpenRouter: 108.0 tokens per second.
Which scores higher on coding, GLM 5.3 or GLM 5.3 Flash?
GLM 5.3 scores higher on coding, with an Artificial Analysis Coding Index of 74.8 compared with 71.5 for GLM 5.3 Flash.