GLM-5.1 vs GLM-5.3-FlashX
GLM-5.1 (Zhipu) versus GLM-5.3-FlashX (Zhipu): API pricing, context window, capabilities and uptime, from the same data as each model page, at the WandAPI default channel price. Input costs 4.8 Credits / M for GLM-5.1 and 1.2 Credits / M for GLM-5.3-FlashX, so GLM-5.3-FlashX is 75% cheaper.
GLM-5.3-FlashXglm-5.3-flashxSpecs side by side
| Item | GLM-5.1glm-5.1 | GLM-5.3-FlashXglm-5.3-flashx |
|---|---|---|
| Input (prompt) · Credits / M | 4.8≈ $0.73 | 1.2≈ $0.182 |
| Output (completion) · Credits / M | 16.8≈ $2.55 | 4.2≈ $0.638 |
| Cache read · Credits / M | 1.2 | 3.34 |
| Context window | — | 1M |
| Max output | 128K | 128K |
| 7-day uptime | — | — |
| Latest probe latency | — | — |
| Measured throughput | 65.8 t/s | 16.8 t/s |
| Protocols | Anthropic Messages | Anthropic Messages / OpenAI Responses |
| Sample monthly cost (10M in + 2M out) | 81.6≈ $12.40 | 20.4≈ $3.10 |
Prices are the WandAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from WandAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which is cheaper, GLM-5.1 or GLM-5.3-FlashX?
At the WandAPI default channel price, GLM-5.1 input costs 4.8 Credits / M and GLM-5.3-FlashX input costs 1.2 Credits / M, so GLM-5.3-FlashX is 75% cheaper. Output and cache prices are in the specs table above.
Can I switch between GLM-5.1 and GLM-5.3-FlashX at any time?
Yes. WandAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.
How do the capabilities of GLM-5.1 and GLM-5.3-FlashX differ?
Their capability flags are identical. Every other capability is either supported by both or by neither; see the capability table above.
More comparisons
One API key for both GLM-5.1 and GLM-5.3-FlashX
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