High-speed GLM-5.3-Flash serving option for coding and agent workflows
GLM 5.3 FlashX by zhipuai is offered by 5 providers on this page. Its official list price is $0.37 per 1M input tokens and $1.25 per 1M output tokens.
The context window is 1,000,000 tokens at the reference host, but hosts report different limits, from 1,000,000 to 1,048,576, so the usable window depends on the provider you pick. It supports reasoning, tool use, and structured output. Accepted input modalities are Text, Image, Video, and PDF. The weights are open, so it can also be self-hosted or served through a gateway of your choice. Providers report the capability flags inconsistently, so verify a specific feature against the host you plan to use.
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Vercel AI Gateway | Cloud | $0.37 | $1.25 | $0.075 | — | 1,000,000 | 131,072 | |
| Zhipu AIOfficial | First-party | $0.37 | $1.25 | $0.075 | $0 | 1,000,000 | 131,072 | |
| OpenRouter | Gateway | $0.37 | $1.25 | $0.075 | — | 1,048,576 ⚠ | 131,072 | |
| Z.AIOfficial | First-party | $0.37 | $1.25 | $0.075 | $0 | 1,000,000 | 131,072 | |
| Kilo Gateway | Gateway | $0.37 | $1.25 | $0.075 | — | 1,048,576 ⚠ | 131,072 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Price history accumulates from each data sync; currently only 1 sample(s) (2026-09-19). Each future sync adds a point, and once accumulated a line is drawn here.