GLM-5.3 Flash
Save 30%Relayzhipu/glm-5.3-flash
GLM-5.3 Flash — the first natively multimodal model in Zhipu's GLM-5 series, stronger than GLM-5.2 at a very low cost.
- Context window
- 1M
- Max output
- 128K
- Input modalities
- text · image
- Output modalities
- text
- Capabilities
- Vision · Reasoning · Tool calling · JSON mode · Coding · Prompt cache
- Upstream release
- 2026-08-26
- RouteMux name
- zhipu/glm-5.3-flash
Try GLM-5.3 Flash here
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GLM-5.3 Flash API pricing
Prices verified 2026-10-12
Cache read $0.021/M · Cache write —/M
Estimate cost
Limited time10% 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 any of these IDs 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 — the first natively multimodal model in Zhipu's GLM-5 series, stronger than GLM-5.2 at a very 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 $0.105 for input and $0.35 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, image as input and produces text as output.
›When was GLM-5.3 Flash released?
GLM-5.3 Flash was released on August 26, 2026.