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Glm 5.3

Auto-discovered from the NVIDIA catalog on 2026-09-15.

z-ai/glm-5.3
Running· verified 5 min ago · 1925ms

What is Glm 5.3?

Glm 5.3 is Z.ai's reasoning model. Auto-discovered from the NVIDIA catalog on 2026-09-15. It runs on Speka's OpenAI-compatible /v1/chat/completions endpoint at $0.20 / 1M input and $0.20 / 1M output tokens, using the model ID z-ai/glm-5.3.

Test it live

Live playgroundGlm 5.3in-browser demo

Test Glm 5.3 live

Send a message and watch the model respond. Multi-turn — it remembers the conversation.

How to call Glm 5.3 via the API

Speka exposes Glm 5.3 on an OpenAI-compatible /v1/chat/completions endpoint. Point any OpenAI SDK at https://speka.me/v1, set model to z-ai/glm-5.3, and your existing code runs unchanged.

quickstart.py
from openai import OpenAI

client = OpenAI(
    base_url="https://speka.me/v1",
    api_key="sk-speka-live-...",  # your Speka key
)

resp = client.chat.completions.create(
    model="z-ai/glm-5.3",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)
FAQ

Frequently asked questions

Glm 5.3 is Z.ai's reasoning model. Auto-discovered from the NVIDIA catalog on 2026-09-15. It is available on Speka's OpenAI-compatible API using the model ID z-ai/glm-5.3.
On Speka, Glm 5.3 is priced at $0.20 / 1M input and $0.20 / 1M output tokens. Pricing is per-token with no subscription or seat fee — usage is billed against your plan's monthly allowance, then at the same rate with no overage penalty. Rates are current as of June 2026; check the pricing page for updates.
Speka exposes Glm 5.3 on an OpenAI-compatible /v1/chat/completions endpoint. Set base_url to https://speka.me/v1, supply your Speka key, and set model to "z-ai/glm-5.3" in any OpenAI SDK — no other code changes are required.
Yes. Glm 5.3 is served through Speka's OpenAI-compatible endpoint, so any application built on the OpenAI Python or Node.js SDK, LangChain, or LlamaIndex can call it by changing only the base URL and model ID.

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