OpenAI compatible API · Attested · Public status

OpenAI: gpt-oss-120b vs SpaceXAI: Grok 4.3

gpt-oss-120b vs SpaceXAI: Grok 4.3: 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

OpenAI: gpt-oss-120b has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while SpaceXAI: Grok 4.3 has the larger context window. Current TrustedRouter probes show OpenAI: gpt-oss-120b with the lower p50 TTFT.

$0.211/1MOpenAI: gpt-oss-120b cheapest route

$3.95625/1MSpaceXAI: Grok 4.3 cheapest route

1399 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via baseten

1424 msSpaceXAI: Grok 4.3 fastest measured p50 TTFT via grok

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.

OpenAI: gpt-oss-120bSpaceXAI: Grok 4.3

Model idopenai/gpt-oss-120bx-ai/grok-4.3

Publisher OpenAI xAI Grok

AI IQ IQ 98#99 IQ 115#44

Context131,072 tokens1,000,000 tokens

Credits provider routes222

Cheapest route$0.211/1M$3.95625/1M

Cached input$0.015825/1M to $0.1055/1M$0.211/1M to $0.422/1M

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1399 ms via baseten1424 ms via grok

Highest measured throughput149 tok/s via io-netnot enough data

Recent route uptime range100.00%100.00%

Modes chat chat

OpenAI: gpt-oss-120b routes

Overview22 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

SpaceXAI: Grok 4.3 routes

Overview2 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="openai/gpt-oss-120b",
    messages=messages,
)

Questions

Which should I use, OpenAI: gpt-oss-120b or SpaceXAI: Grok 4.3?

Is OpenAI: gpt-oss-120b or SpaceXAI: Grok 4.3 cheaper?

The current cheapest TrustedRouter route is $0.211/1M for OpenAI: gpt-oss-120b and $3.95625/1M for SpaceXAI: Grok 4.3. The comparison uses current catalog prices and updates as provider pricing changes.

Is OpenAI: gpt-oss-120b or SpaceXAI: Grok 4.3 faster?

Current measured p50 time to first token is 1399 ms for OpenAI: gpt-oss-120b and 1424 ms for SpaceXAI: Grok 4.3. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test OpenAI: gpt-oss-120b and SpaceXAI: Grok 4.3 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between openai/gpt-oss-120b and x-ai/grok-4.3. This makes side-by-side evals possible without maintaining two provider integrations.