OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4 Flash 0731 vs OpenAI: gpt-oss-120b

DeepSeek V4 Flash 0731 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 DeepSeek: DeepSeek V4 Flash 0731 has the larger context window. Current TrustedRouter probes show OpenAI: gpt-oss-120b with the lower p50 TTFT.

$0.273/1MDeepSeek: DeepSeek V4 Flash 0731 cheapest route

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

1018 msDeepSeek: DeepSeek V4 Flash 0731 fastest measured p50 TTFT via baseten

821 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via together

DeepSeek: DeepSeek V4 Flash 0731OpenAI: gpt-oss-120b

Model iddeepseek/deepseek-v4-flash-0731openai/gpt-oss-120b

Publisher DeepSeek OpenAI

AI IQ — IQ 105#53

Context1,048,576 tokens131,072 tokens

Provider routes1625

Cheapest route$0.273/1M$0.21735/1M

Privacy posturehas ZDR routehas provider E2EE route

Fastest measured p50 TTFT1018 ms via baseten821 ms via together

Highest measured throughput130 tok/s via atlas-cloud271 tok/s via cerebras

Recent route uptime range99.80% to 100.00%100.00%

Modes chat chat

DeepSeek: DeepSeek V4 Flash 0731 routes

Overview16 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

OpenAI: gpt-oss-120b routes

Overview25 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="deepseek/deepseek-v4-flash-0731",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4 Flash 0731 or OpenAI: gpt-oss-120b?

Is DeepSeek: DeepSeek V4 Flash 0731 or OpenAI: gpt-oss-120b cheaper?

The current cheapest TrustedRouter route is $0.273/1M for DeepSeek: DeepSeek V4 Flash 0731 and $0.21735/1M for OpenAI: gpt-oss-120b. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4 Flash 0731 or OpenAI: gpt-oss-120b faster?

Current measured p50 time to first token is 1018 ms for DeepSeek: DeepSeek V4 Flash 0731 and 821 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 Flash 0731 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-flash-0731 and openai/gpt-oss-120b. This makes side-by-side evals possible without maintaining two provider integrations.