OpenAI compatible API · Attested · Public status
nvidia/NVIDIA-Nemotron-3-Ultra-550B vs Z.ai: GLM 4.5 Air
Compare nvidia/NVIDIA-Nemotron-3-Ultra-550B and Z.ai: GLM 4.5 Air by providers, context, price, and TrustedRouter route support.
Onebase URL to migrate
100sof models and routes
Noneprompt logs by default
Compare routesProviders, price, context, and policy posture in one view.
Use auto when uptime mattersKeep a primary model and let fallback handle provider failures.
Same API shapeUse the OpenAI client and set the model you want.
Practical read
Z.ai: GLM 4.5 Air has the lower cheapest prompt+completion route on TrustedRouter. nvidia/NVIDIA-Nemotron-3-Ultra-550B has more provider fallback routes, while nvidia/NVIDIA-Nemotron-3-Ultra-550B has the larger context window. Current TrustedRouter probes show Z.ai: GLM 4.5 Air with the lower p50 TTFT.
$2.73/1Mnvidia/NVIDIA-Nemotron-3-Ultra-550B cheapest route
$1.05/1MZ.ai: GLM 4.5 Air cheapest route
9108 msnvidia/NVIDIA-Nemotron-3-Ultra-550B measured p50 TTFT
5789 msZ.ai: GLM 4.5 Air measured p50 TTFT
nvidia/NVIDIA-Nemotron-3-Ultra-550BZ.ai: GLM 4.5 Air
Model id
nvidia/nemotron-3-ultra-550bz-ai/glm-4.5-air
PublisherCrusoeZ.AI
AI IQ
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Context262,144 tokens131,072 tokens
Provider routes44
Cheapest route$2.73/1M$1.05/1M
Privacy postureprovider posture variesprovider posture varies
Modes
chat
chat
nvidia/NVIDIA-Nemotron-3-Ultra-550B routes
Production choice
Pick a default model. Keep fallback enabled.
TrustedRouter is useful when you know the model you want, but still need provider rollover, budget limits, usage records, and a prompt path you can verify.
OpenAI clientPython
client = OpenAI(
base_url="https://api.trustedrouter.com/v1",
api_key="sk-tr-v1-..."
)
response = client.chat.completions.create(
model="nvidia/nemotron-3-ultra-550b",
messages=messages,
)