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OpenAI GPT OSS vs DeepSeek: DeepSeek V4.1 Flash

Try both on us. Starter credit covers your first requests, then one key routes OpenAI GPT OSS and DeepSeek V4.1 Flash. 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 V4.1 Flash has the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token.

$1.1605/1MOpenAI GPT OSS cheapest route

$0.15825/1MDeepSeek: DeepSeek V4.1 Flash cheapest route

913 msOpenAI GPT OSS fastest measured p50 TTFT via cerebras

886 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via baseten

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.

OpenAI GPT OSSDeepSeek: DeepSeek V4.1 Flash

Model idcerebras/gpt-oss-120bdeepseek/deepseek-v4.1-flash

PublisherNot stated DeepSeek

AI IQ IQ 98#136 IQ 126#24

Context131,072 tokens1,048,576 tokens

Credits provider routes124

Cheapest route$1.1605/1M$0.15825/1M

Cached inputNot published$0.01/1M to $0.1899/1M

Privacy posturehas ZDR routehas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFT913 ms via cerebras886 ms via baseten

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%96.67% to 100.00%

Modes chat chat decide

OpenAI GPT OSS routes

Overview1 Credits routes

DeepSeek: DeepSeek V4.1 Flash routes

Overview24 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="cerebras/gpt-oss-120b",
    messages=messages,
)

Questions

Which should I use, OpenAI GPT OSS or DeepSeek: DeepSeek V4.1 Flash?

DeepSeek V4.1 Flash has the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token.

Is OpenAI GPT OSS or DeepSeek: DeepSeek V4.1 Flash cheaper?

The current cheapest TrustedRouter route is $1.1605/1M for OpenAI GPT OSS and $0.15825/1M for DeepSeek: DeepSeek V4.1 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is OpenAI GPT OSS or DeepSeek: DeepSeek V4.1 Flash faster?

Current measured p50 time to first token is 913 ms for OpenAI GPT OSS and 886 ms for DeepSeek: DeepSeek V4.1 Flash. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test OpenAI GPT OSS and DeepSeek: DeepSeek V4.1 Flash with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between cerebras/gpt-oss-120b and deepseek/deepseek-v4.1-flash. This makes side-by-side evals possible without maintaining two provider integrations.