GLM-5.3
Save 85%Relayzhipu/glm-5.3
GLM-5.3 — Zhipu's flagship reasoning model with a 1M-token context.
- Context window
- 1M
- Max output
- 128K
- Input modalities
- text
- Output modalities
- text
- Capabilities
- Reasoning · Tool Calling · Coding · Cache
- Upstream release
- 2026-08-20
- RouteMux name
- zhipu/glm-5.3
Try GLM-5.3 here
Tune the request, see the current price ceiling, and inspect the real response without leaving this model page.
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Enter an input on the left. The same RouteMux Playground execution and billing path powers this embedded test.
GLM-5.3 API pricing
Source: opencode_x0.15 · Verified 2026-08-30
Cache read $0.039/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-5.3Replace 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",
messages=[{"role": "user", "content": "What is the meaning of life?"}],
)
print(completion.choices[0].message.content)Performance (last 30 days)
GLM-5.3 FAQ
›What is GLM-5.3?
GLM-5.3 — Zhipu's flagship reasoning model with a 1M-token context.
›How large is the context window of GLM-5.3?
GLM-5.3 supports a context window of up to 1M tokens, with up to 128K output tokens per request.
›How much does the GLM-5.3 API cost?
Through RouteMux, GLM-5.3 costs $0.21 for input and $0.66 for output (USD per 1M tokens), below the official list price.
›How do I call GLM-5.3 via API?
GLM-5.3 is OpenAI-compatible: point your base URL at RouteMux and set the model field to zhipu/glm-5.3 — no code changes needed.
›Which input and output modalities does GLM-5.3 support?
GLM-5.3 accepts text as input and produces text as output.
›When was GLM-5.3 released?
GLM-5.3 was released on August 20, 2026.