OpenAI compatible API · Attested · Public status
NVIDIA: Nemotron 3 Ultra vs OpenAI: GPT-5.6 Terra
Compare NVIDIA: Nemotron 3 Ultra and OpenAI: GPT-5.6 Terra 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
NVIDIA: Nemotron 3 Ultra has the lower cheapest prompt+completion route on TrustedRouter. NVIDIA: Nemotron 3 Ultra has more provider fallback routes, while OpenAI: GPT-5.6 Terra has the larger context window. Current TrustedRouter probes show OpenAI: GPT-5.6 Terra with the lower p50 TTFT.
$3.15/1MNVIDIA: Nemotron 3 Ultra cheapest route
$18.375/1MOpenAI: GPT-5.6 Terra cheapest route
2713 msNVIDIA: Nemotron 3 Ultra measured p50 TTFT
1837 msOpenAI: GPT-5.6 Terra measured p50 TTFT
NVIDIA: Nemotron 3 UltraOpenAI: GPT-5.6 Terra
Model id
nvidia/nemotron-3-ultra-550b-a55bopenai/gpt-5.6-terra
PublisherTogetherOpenAI
Context512,288 tokens1,050,000 tokens
Provider routes76
Cheapest route$3.15/1M$18.375/1M
Privacy posturehas ZDR routeprovider posture varies
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,
)