OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4 Flash 0731 vs Mistral: Mistral Medium 3.5

DeepSeek V4 Flash 0731 vs Mistral Medium 3.5: 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 Flash 0731 has the lower cheapest prompt+completion route on TrustedRouter. DeepSeek: DeepSeek V4 Flash 0731 has more provider fallback routes, while DeepSeek: DeepSeek V4 Flash 0731 has the larger context window. Current TrustedRouter probes show DeepSeek: DeepSeek V4 Flash 0731 with the lower p50 TTFT.

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

$9.495/1MMistral: Mistral Medium 3.5 cheapest route

1014 msDeepSeek: DeepSeek V4 Flash 0731 fastest measured p50 TTFT via pearl

1163 msMistral: Mistral Medium 3.5 fastest measured p50 TTFT via mistral

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 0731Mistral: Mistral Medium 3.5

Model iddeepseek/deepseek-v4-flash-0731mistralai/mistral-medium-3-5

Publisher DeepSeek Mistral

AI IQ — —

Context1,048,576 tokens262,144 tokens

Credits provider routes241

Cheapest route$0.142425/1M$9.495/1M

Cached input$0.01/1M to $0.121241/1MNot published

Privacy posturehas confidential-compute routeprovider posture varies

Fastest measured p50 TTFT1014 ms via pearl1163 ms via mistral

Highest measured throughput244 tok/s via confidential-ainot enough data

Recent route uptime range0.00% to 100.00%100.00%

Modes chat chat

DeepSeek: DeepSeek V4 Flash 0731 routes

Overview24 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Mistral: Mistral Medium 3.5 routes

Overview1 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-flash-0731",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4 Flash 0731 or Mistral: Mistral Medium 3.5?

Is DeepSeek: DeepSeek V4 Flash 0731 or Mistral: Mistral Medium 3.5 cheaper?

The current cheapest TrustedRouter route is $0.142425/1M for DeepSeek: DeepSeek V4 Flash 0731 and $9.495/1M for Mistral: Mistral Medium 3.5. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4 Flash 0731 or Mistral: Mistral Medium 3.5 faster?

Current measured p50 time to first token is 1014 ms for DeepSeek: DeepSeek V4 Flash 0731 and 1163 ms for Mistral: Mistral Medium 3.5. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4 Flash 0731 and Mistral: Mistral Medium 3.5 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 mistralai/mistral-medium-3-5. This makes side-by-side evals possible without maintaining two provider integrations.