OpenAI compatible API · Attested · Public status

OpenAI: gpt-oss-120b vs Qwen3-4B-Instruct-2507

gpt-oss-120b vs Qwen3-4B-Instruct-2507: 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

Qwen3-4B-Instruct-2507 has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while Qwen3-4B-Instruct-2507 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

$0.0422/1MQwen3-4B-Instruct-2507 cheapest route

1035 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via cloudflare-workers-ai

1835 msQwen3-4B-Instruct-2507 fastest measured p50 TTFT via nscale

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-120bQwen3-4B-Instruct-2507

Model idopenai/gpt-oss-120bqwen/qwen3-4b-instruct-2507

Publisher OpenAI Nscale

AI IQ IQ 98#99 —

Context131,072 tokens262,144 tokens

Credits provider routes221

Cheapest route$0.211/1M$0.0422/1M

Cached input$0.015825/1M to $0.1055/1MNot published

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1035 ms via cloudflare-workers-ai1835 ms via nscale

Highest measured throughput140 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

Qwen3-4B-Instruct-2507 routes

Overview1 Credits routes

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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 Qwen3-4B-Instruct-2507?

Is OpenAI: gpt-oss-120b or Qwen3-4B-Instruct-2507 cheaper?

The current cheapest TrustedRouter route is $0.211/1M for OpenAI: gpt-oss-120b and $0.0422/1M for Qwen3-4B-Instruct-2507. The comparison uses current catalog prices and updates as provider pricing changes.

Is OpenAI: gpt-oss-120b or Qwen3-4B-Instruct-2507 faster?

Current measured p50 time to first token is 1035 ms for OpenAI: gpt-oss-120b and 1835 ms for Qwen3-4B-Instruct-2507. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test OpenAI: gpt-oss-120b and Qwen3-4B-Instruct-2507 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 qwen/qwen3-4b-instruct-2507. This makes side-by-side evals possible without maintaining two provider integrations.