OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4.1 Flash vs OpenAI: gpt-oss-120b

DeepSeek V4.1 Flash 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

Monthly evidence

DeepSeek: DeepSeek V4.1 Flash has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while DeepSeek: DeepSeek V4.1 Flash has the larger context window. Current TrustedRouter probes show DeepSeek: DeepSeek V4.1 Flash with the lower p50 TTFT.

$0.1266/1MDeepSeek: DeepSeek V4.1 Flash cheapest route

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

1251 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via engy

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

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.

DeepSeek: DeepSeek V4.1 FlashOpenAI: gpt-oss-120b

Model iddeepseek/deepseek-v4.1-flashopenai/gpt-oss-120b

Publisher DeepSeek OpenAI

AI IQ IQ 116#38 IQ 98#99

Context1,048,576 tokens131,072 tokens

Credits provider routes1022

Cheapest route$0.1266/1M$0.211/1M

Cached input$0.01/1M to $0.17091/1M$0.015825/1M to $0.1055/1M

Privacy posturehas ZDR routehas provider E2EE route

Fastest measured p50 TTFT1251 ms via engy1399 ms via baseten

Highest measured throughputnot enough data149 tok/s via io-net

Recent route uptime range100.00%100.00%

Modes chat chat

DeepSeek: DeepSeek V4.1 Flash routes

Overview10 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

OpenAI: gpt-oss-120b routes

Overview22 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="deepseek/deepseek-v4.1-flash",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4.1 Flash or OpenAI: gpt-oss-120b?

Is DeepSeek: DeepSeek V4.1 Flash or OpenAI: gpt-oss-120b cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash and $0.211/1M for OpenAI: gpt-oss-120b. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4.1 Flash or OpenAI: gpt-oss-120b faster?

Current measured p50 time to first token is 1251 ms for DeepSeek: DeepSeek V4.1 Flash and 1399 ms for OpenAI: gpt-oss-120b. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4.1 Flash 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 deepseek/deepseek-v4.1-flash and openai/gpt-oss-120b. This makes side-by-side evals possible without maintaining two provider integrations.