OpenAI compatible API · Attested · Public status

NVIDIA: Nemotron 3 Ultra vs OpenAI: GPT-6 Astra

NVIDIA: Nemotron 3 Ultra vs GPT-6 Astra: compare current API pricing, context, provider routes, privacy, p50 latency, and OpenAI-compatible access.

Verify gateway

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

Monthly evidence

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-6 Astra has the larger context window. Current TrustedRouter probes show NVIDIA: Nemotron 3 Ultra with the lower p50 TTFT.

$2.79575/1MNVIDIA: Nemotron 3 Ultra cheapest route

$63.299999/1MOpenAI: GPT-6 Astra cheapest route

1774 msNVIDIA: Nemotron 3 Ultra fastest measured p50 TTFT via wandb

2973 msOpenAI: GPT-6 Astra fastest measured p50 TTFT via lightning

Prices and live route measurements can change. Use the monthly reports when you need a stable evidence window, then run a small task-specific eval before choosing a production default.

NVIDIA: Nemotron 3 UltraOpenAI: GPT-6 Astra

Model idnvidia/nemotron-3-ultra-550b-a55bopenai/gpt-6-astra

Publisher DeepInfra OpenAI

AI IQ — IQ 139#1

Context262,144 tokens1,050,000 tokens

Credits provider routes53

Cheapest route$2.79575/1M$63.299999/1M

Cached input$0.1055/1M to $0.1266/1M$1.055/1M to $2.11/1M

Privacy posturehas ZDR routehas ZDR route

Fastest measured p50 TTFT1774 ms via wandb2973 ms via lightning

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%100.00%

Modes chat chat

NVIDIA: Nemotron 3 Ultra routes

Overview5 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

OpenAI: GPT-6 Astra routes

Overview3 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

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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,
)

Questions

Which should I use, NVIDIA: Nemotron 3 Ultra or OpenAI: GPT-6 Astra?

Is NVIDIA: Nemotron 3 Ultra or OpenAI: GPT-6 Astra cheaper?

The current cheapest TrustedRouter route is $2.79575/1M for NVIDIA: Nemotron 3 Ultra and $63.299999/1M for OpenAI: GPT-6 Astra. The comparison uses current catalog prices and updates as provider pricing changes.

Is NVIDIA: Nemotron 3 Ultra or OpenAI: GPT-6 Astra faster?

Current measured p50 time to first token is 1774 ms for NVIDIA: Nemotron 3 Ultra and 2973 ms for OpenAI: GPT-6 Astra. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test NVIDIA: Nemotron 3 Ultra and OpenAI: GPT-6 Astra with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between nvidia/nemotron-3-ultra-550b-a55b and openai/gpt-6-astra. This makes side-by-side evals possible without maintaining two provider integrations.