Model tracker / Z.ai
GLM-5.3 FlashX
GLM-5.3 FlashX is a fast open-weight model from Z.ai, released 26 August 2026. At Z.ai it costs $0.37 per million input tokens and $1.25 per million output tokens, with a 1M-token context window.
- Made by
- Z.ai
- Released
- 2026-08-26
- Status
- Generally available
- Tier
- Fast
- Weights
- Open
- Context window
- 1,000,000 tokens
- Max output
- 128,000 tokens
- Input
- text, image, video
- API id
glm-5.3-flashx
GLM-5.3 FlashX price at Z.ai
US dollars per million tokens. Blended is 3 input tokens for every output token, one number to compare on.
| Provider | Input | Output | Cached input | Blended | Batch | Checked |
|---|---|---|---|---|---|---|
| Z.ai · maker | $0.37 | $1.25 | $0.075 | $0.59 | – | 2026-10-14 |
- Z.ai: A faster serving tier of GLM-5.3 Flash (about 200 tokens/s). Cached-input storage is free for a limited time.
GLM-5.3 FlashX benchmarks
| Benchmark | Score | What it measures | Reported by |
|---|---|---|---|
| LMArena text score | 1473 | Elo-style score from people voting between answers | Independent |
Scores reported by a model's maker aren't independently checked.
Models like GLM-5.3 FlashX
Other fast models closest in price, at each maker's own price or the cheapest provider.
| Model | Input | Output | Context | Weights |
|---|---|---|---|---|
| GLM-5.3 FlashX | $0.37 | $1.25 | 1M | Open |
| Gemini 3.1 Flash-Lite Google | $0.25 | $1.50 | 1M | Closed |
| Muse Glimmer 30B Meta | $0.35 | $1.50 | 131K | Open |
| DeepSeek V4.1 Flash DeepSeek | $0.30 | $1.20 | 1M | Open |
| Step 3.7 Flash StepFun | $0.20 | $1.15 | 256K | Open |
| Qwen3.6 35B A3B Alibaba | $0.375 | $2.25 | 256K | Open |
Compare them all in the model tracker →
GLM-5.3 FlashX FAQ
How much does GLM-5.3 FlashX cost?
GLM-5.3 FlashX costs $0.37 per million input tokens and $1.25 per million output tokens at Z.ai, and $0.075 per million cached input tokens. Prices are list prices in US dollars, last checked 14 October 2026.
What is GLM-5.3 FlashX's context window?
GLM-5.3 FlashX takes up to 1,000,000 tokens in one request and writes up to 128,000 tokens in one response.
Is GLM-5.3 FlashX open weight?
Yes. Z.ai publishes the weights, so you can run GLM-5.3 FlashX yourself or at any host that serves it.
Where can I use GLM-5.3 FlashX?
GLM-5.3 FlashX is available from Z.ai. At Z.ai, call it as glm-5.3-flashx.