OpenAI compatible API · Attested · Public status
NVIDIA: Nemotron 3 Ultra vs OpenAI: gpt-oss-120b
Compare NVIDIA: Nemotron 3 Ultra and OpenAI: gpt-oss-120b 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
OpenAI: gpt-oss-120b has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while NVIDIA: Nemotron 3 Ultra has the larger context window. Probe-backed speed data is shown when enough recent samples exist.
$3.15/1MNVIDIA: Nemotron 3 Ultra cheapest route
$0.21735/1MOpenAI: gpt-oss-120b cheapest route
not enough dataNVIDIA: Nemotron 3 Ultra measured p50 TTFT
not enough dataOpenAI: gpt-oss-120b measured p50 TTFT
NVIDIA: Nemotron 3 UltraOpenAI: gpt-oss-120b
Model id
nvidia/nemotron-3-ultra-550b-a55bopenai/gpt-oss-120b
PublisherTogetherOpenAI
Context512,288 tokens131,072 tokens
Provider routes724
Cheapest route$3.15/1M$0.21735/1M
Privacy posturehas ZDR routehas provider E2EE 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://gchircrcif.eu-west-3.awsapprunner.com/v1",
api_key="sk-tr-v1-..."
)
response = client.chat.completions.create(
model="nvidia/nemotron-3-ultra-550b-a55b",
messages=messages,
)