Zhipu AI (Z.ai) · 1M context · flagship reasoning · OpenAI-compatible · pay-as-you-go
Zhipu AI (Z.ai) official list price vs. Waterseller relay price. Verified Nov 2026 · official pricing page.
| Direction | Official | Waterseller | You save |
|---|---|---|---|
| Input | $1.4 | $0.35 | 75% off |
| Output | $4.4 | $1.1 | 75% off |
Cache-aware billing supported where the vendor offers it. 1M context · flagship reasoning.
The full GLM-5.3 flagship for complex reasoning, long-horizon agents and production coding tasks.
One line changes: point base_url at Waterseller. Everything else is stock OpenAI SDK.
from openai import OpenAI
client = OpenAI(
api_key="sk-...", # your Waterseller key
base_url="https://waterseller.cc/v1" # one-line switch
)
resp = client.chat.completions.create(
model="glm-5.3",
messages=[{"role": "user", "content": "Hello!"}]
)
print(resp.choices[0].message.content)
Common questions about GLM-5.3 API relay pricing.
Input: $0.35 per million tokens. Output: $1.1 per million tokens. That's 75% below Zhipu AI (Z.ai)'s official list price of $1.4 / $4.4. Pay-as-you-go, no minimum spend, no subscription.
Register a Waterseller account, create a key on the Tokens page, and point your OpenAI SDK base_url to https://waterseller.cc/v1. New accounts get $1 in free credit — enough to test before paying anything.
Yes — identical weights and identical official endpoints. We operate a relay that bills at wholesale rates; nothing about the model, its context window, or its capabilities is modified.
All official features are supported: streaming (SSE), function/tool calling, JSON mode, and vision where the vendor supports it. Latency matches direct access.
Live in 5 minutes · one-line switch from OpenAI SDK
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