Z.ai
GLM 5.3 FlashX
GLM-5.3-FlashX is the high-speed variant of Z.ai's GLM-5.3-Flash, a native multimodal model delivering inference speeds of up to 200 tokens/s.
At a glance
- Input / 1M
- $0.37
- Output / 1M
- $1.25
- Context
- 1.05M
- Max output
- 131K
- Intelligence
- Not available
- Released
- Sep 2026
Pricing
GLM 5.3 FlashX API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $0.37 |
|---|---|
| Output tokensPer 1M tokens | $1.25 |
| Cached input (read)Per 1M tokens | $0.09 |
| Cache writePer 1M tokens | Not available |
Chat message
2K in, 500 out
$1.37
per 1,000 requests
Coding task
30K in, 4K out
$16.10
per 1,000 requests
Long document summary
150K in, 2K out
$58
per 1,000 requests
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 1.05M tokens
- Max output
- 131K tokens
- Input types
- Image, Text, Video
- Output types
- Text
- Reasoning effort
- Max, High, Low
- Release date
- September 18, 2026
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
GLM 5.3 FlashX vs other models
See how GLM 5.3 FlashX stacks up head to head on price, benchmarks, and features.
GLM 5.3 FlashX vs DeepSeek V4.1 Flash
Z.ai vs DeepSeek
See comparisonGLM 5.3 FlashX vs GLM 5.3 Flash
Z.ai vs Z.ai
See comparisonGLM 5.3 FlashX vs Hy4 preview
Z.ai vs Tencent
See comparison
GLM 5.3 FlashX vs GPT-6 Luna
Z.ai vs OpenAI
See comparisonGLM 5.3 FlashX vs DeepSeek V4 Flash 0731
Z.ai vs DeepSeek
See comparisonGLM 5.3 FlashX vs DeepSeek V4 Flash 0423
Z.ai vs DeepSeek
See comparisonMore GLM 5.3 FlashX comparisons
Alternatives
GLM 5.3 FlashX alternatives
Similar models worth considering, and where each one has the edge.
Z.ai
GLM 5.3 Flash
DeepSeek
DeepSeek V4.1 Flash
OpenAI
GPT-6 Luna
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does GLM 5.3 FlashX cost?
GLM 5.3 FlashX costs $0.37 per 1M input tokens and $1.25 per 1M output tokens through the API. A typical chat message costs about $1.37 per 1,000 messages.
What is the context window of GLM 5.3 FlashX?
GLM 5.3 FlashX accepts up to 1.05M tokens of input and can write up to 131K tokens in a single response.
What is the best alternative to GLM 5.3 FlashX?
GLM 5.3 Flash from Z.ai is a strong alternative. It offers: 2.5x cheaper output.
Can I use GLM 5.3 FlashX alongside other models?
Yes. Shortcut Chat sends one prompt to GLM 5.3 FlashX and any other models you pick at the same time, so you can compare answers side by side.
Try GLM 5.3 FlashX next to every other model.
Use GLM 5.3 FlashX alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.