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DeepSeek: DeepSeek V4 Flash 0731 vs OpenAI: gpt-oss-20b

Try both on us. Starter credit covers your first requests, then one key routes DeepSeek V4 Flash 0731 and gpt-oss-20b. Switch by changing the model name.

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 V4 Flash 0731 has more Credits provider routes and the larger context window. gpt-oss-20b has the lower published input-plus-output rate and the lower measured p50 time to first token.

$0.142425/1MDeepSeek: DeepSeek V4 Flash 0731 cheapest route

$0.057475/1MOpenAI: gpt-oss-20b cheapest route

865 msDeepSeek: DeepSeek V4 Flash 0731 fastest measured p50 TTFT via engy

584 msOpenAI: gpt-oss-20b fastest measured p50 TTFT via akashml

The price comparison adds each route's rate for one million input tokens and one million output tokens; your cost depends on your input/output mix. 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 Flash 0731OpenAI: gpt-oss-20b

Model iddeepseek/deepseek-v4-flash-0731openai/gpt-oss-20b

Publisher DeepSeek OpenAI

AI IQ — IQ 93#155

Context1,048,576 tokens131,072 tokens

Credits provider routes2613

Cheapest route$0.142425/1M$0.057475/1M

Cached input$0.01/1M to $0.118793/1M$0.01/1M to $0.029013/1M

Privacy posturehas Confidential route (E2EE + ZDR)has ZDR route

Fastest measured p50 TTFT865 ms via engy584 ms via akashml

Highest measured throughput105 tok/s via confidential-ainot enough data

Recent route uptime range96.67% to 100.00%50.00% to 100.00%

Modes chat chat decide

DeepSeek: DeepSeek V4 Flash 0731 routes

Overview26 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

OpenAI: gpt-oss-20b routes

Overview13 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-flash-0731",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4 Flash 0731 or OpenAI: gpt-oss-20b?

DeepSeek V4 Flash 0731 has more Credits provider routes and the larger context window. gpt-oss-20b has the lower published input-plus-output rate and the lower measured p50 time to first token.

Is DeepSeek: DeepSeek V4 Flash 0731 or OpenAI: gpt-oss-20b cheaper?

The current cheapest TrustedRouter route is $0.142425/1M for DeepSeek: DeepSeek V4 Flash 0731 and $0.057475/1M for OpenAI: gpt-oss-20b. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4 Flash 0731 or OpenAI: gpt-oss-20b faster?

Current measured p50 time to first token is 865 ms for DeepSeek: DeepSeek V4 Flash 0731 and 584 ms for OpenAI: gpt-oss-20b. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4 Flash 0731 and OpenAI: gpt-oss-20b 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-flash-0731 and openai/gpt-oss-20b. This makes side-by-side evals possible without maintaining two provider integrations.