OpenAI compatible API · Attested · Public status

Mistral: Mistral Small 4 vs OpenAI: gpt-oss-120b

Mistral Small 4 vs gpt-oss-120b: 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

OpenAI: gpt-oss-120b has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while Mistral: Mistral Small 4 has the larger context window. Current TrustedRouter probes show OpenAI: gpt-oss-120b with the lower p50 TTFT.

$0.7875/1MMistral: Mistral Small 4 cheapest route

$0.21735/1MOpenAI: gpt-oss-120b cheapest route

2461 msMistral: Mistral Small 4 fastest measured p50 TTFT via mistral

969 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via parasail

Mistral: Mistral Small 4OpenAI: gpt-oss-120b

Model idmistralai/mistral-small-2603openai/gpt-oss-120b

Publisher Mistral OpenAI

AI IQ — IQ 105#53

Context262,144 tokens131,072 tokens

Provider routes226

Cheapest route$0.7875/1M$0.21735/1M

Privacy postureprovider posture varieshas provider E2EE route

Fastest measured p50 TTFT2461 ms via mistral969 ms via parasail

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%85.71% to 100.00%

Modes chat chat

Mistral: Mistral Small 4 routes

Overview2 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

OpenAI: gpt-oss-120b routes

Overview26 endpoints
PricingPrompt and completion 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="mistralai/mistral-small-2603",
    messages=messages,
)

Questions

Which should I use, Mistral: Mistral Small 4 or OpenAI: gpt-oss-120b?

Is Mistral: Mistral Small 4 or OpenAI: gpt-oss-120b cheaper?

The current cheapest TrustedRouter route is $0.7875/1M for Mistral: Mistral Small 4 and $0.21735/1M for OpenAI: gpt-oss-120b. The comparison uses current catalog prices and updates as provider pricing changes.

Is Mistral: Mistral Small 4 or OpenAI: gpt-oss-120b faster?

Current measured p50 time to first token is 2461 ms for Mistral: Mistral Small 4 and 969 ms for OpenAI: gpt-oss-120b. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Mistral: Mistral Small 4 and OpenAI: gpt-oss-120b with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between mistralai/mistral-small-2603 and openai/gpt-oss-120b. This makes side-by-side evals possible without maintaining two provider integrations.