OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4.1 Flash vs OpenAI: GPT-5 Pro

DeepSeek V4.1 Flash vs GPT-5 Pro: 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. DeepSeek: DeepSeek V4.1 Flash has more provider fallback routes, while DeepSeek: DeepSeek V4.1 Flash has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

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

$142.425/1MOpenAI: GPT-5 Pro cheapest route

1489 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via makora

not enough dataOpenAI: GPT-5 Pro fastest measured p50 TTFT

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-5 Pro

Model iddeepseek/deepseek-v4.1-flashopenai/gpt-5-pro

Publisher DeepSeek OpenAI

AI IQ IQ 116#38 —

Context1,048,576 tokens400,000 tokens

Credits provider routes130

Cheapest route$0.1266/1M$142.425/1M

Cached input$0.01/1M to $0.162998/1MNot published

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1489 ms via makoranot enough data

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%not enough data

Modes chat chat

DeepSeek: DeepSeek V4.1 Flash routes

Overview13 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

OpenAI: GPT-5 Pro routes

Overview0 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="deepseek/deepseek-v4.1-flash",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4.1 Flash or OpenAI: GPT-5 Pro?

Is DeepSeek: DeepSeek V4.1 Flash or OpenAI: GPT-5 Pro cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash and $142.425/1M for OpenAI: GPT-5 Pro. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4.1 Flash or OpenAI: GPT-5 Pro faster?

Current measured p50 time to first token is 1489 ms for DeepSeek: DeepSeek V4.1 Flash and not enough data for OpenAI: GPT-5 Pro. 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-5 Pro 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-5-pro. This makes side-by-side evals possible without maintaining two provider integrations.