OpenAI compatible API · Attested · Public status
NVIDIA: Nemotron 3 Ultra vs Qwen: Qwen3.5 397B A17B
Compare NVIDIA: Nemotron 3 Ultra and Qwen: Qwen3.5 397B A17B by providers, context, price, and TrustedRouter route support.
Onebase URL to migrate
100sof models and routes
0prompt or output logs. Always.
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
Qwen: Qwen3.5 397B A17B has the lower cheapest prompt+completion route on TrustedRouter. Qwen: Qwen3.5 397B A17B has more provider fallback routes, while NVIDIA: Nemotron 3 Ultra has the larger context window. Current TrustedRouter probes show Qwen: Qwen3.5 397B A17B with the lower p50 TTFT.
$3.15/1MNVIDIA: Nemotron 3 Ultra cheapest route
$2.97675/1MQwen: Qwen3.5 397B A17B cheapest route
3087 msNVIDIA: Nemotron 3 Ultra measured p50 TTFT
1338 msQwen: Qwen3.5 397B A17B measured p50 TTFT
NVIDIA: Nemotron 3 UltraQwen: Qwen3.5 397B A17B
Model id
nvidia/nemotron-3-ultra-550b-a55bqwen/qwen3.5-397b-a17b
PublisherTogetherDeepInfra
AI IQ
—
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Context512,288 tokens262,144 tokens
Provider routes716
Cheapest route$3.15/1M$2.97675/1M
Privacy posturehas ZDR routehas confidential-compute route
Modes
chat
chat
NVIDIA: Nemotron 3 Ultra 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-a55b",
messages=messages,
)