GLM-5.3 Flash
Save 85%Relayzhipu/glm-5.3-flash
GLM-5.3 Flash — lightweight GLM-5.3 tuned for speed and ultra-low cost.
- Context window
- 1M
- Max output
- 128K
- Input modalities
- text
- Output modalities
- text
- Capabilities
- Reasoning · Tool Calling · Coding · Cache
- Upstream release
- 2026-08-26
- RouteMux name
- zhipu/glm-5.3-flash
Try GLM-5.3 Flash here
Tune the request, see the current price ceiling, and inspect the real response without leaving this model page.
Your result will appear here
Enter an input on the left. The same RouteMux Playground execution and billing path powers this embedded test.
GLM-5.3 Flash API pricing
Source: opencode_x0.15 · Verified 2026-08-30
Cache read $0.0045/M · Cache write —/M
Estimate cost
Limited time20% extra Credits on your first top-up — up to 200 bonus Credits
Applies to your first top-up within 72 hours of signing up. Minimum $20, once per account.
Key capabilities
Interface and protocols
Use either ID to call this model via the API.
zhipu/glm-5.3-flashReplace the ROUTEMUX_KEY placeholder with your API key. Create one →
from openai import OpenAI
client = OpenAI(
base_url="https://api.routemux.com/v1",
api_key="<ROUTEMUX_KEY>",
)
completion = client.chat.completions.create(
model="zhipu/glm-5.3-flash",
messages=[{"role": "user", "content": "What is the meaning of life?"}],
)
print(completion.choices[0].message.content)Performance (last 30 days)
GLM-5.3 Flash FAQ
›What is GLM-5.3 Flash?
GLM-5.3 Flash — lightweight GLM-5.3 tuned for speed and ultra-low cost.
›How large is the context window of GLM-5.3 Flash?
GLM-5.3 Flash supports a context window of up to 1M tokens, with up to 128K output tokens per request.
›How much does the GLM-5.3 Flash API cost?
Through RouteMux, GLM-5.3 Flash costs $0.0225 for input and $0.075 for output (USD per 1M tokens), below the official list price.
›How do I call GLM-5.3 Flash via API?
GLM-5.3 Flash is OpenAI-compatible: point your base URL at RouteMux and set the model field to zhipu/glm-5.3-flash — no code changes needed.
›Which input and output modalities does GLM-5.3 Flash support?
GLM-5.3 Flash accepts text as input and produces text as output.
›When was GLM-5.3 Flash released?
GLM-5.3 Flash was released on August 26, 2026.