OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V3.1 Terminus vs DeepSeek: DeepSeek V4 Pro

DeepSeek V3.1 Terminus vs DeepSeek V4 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

DeepSeek: DeepSeek V3.1 Terminus has the lower cheapest prompt+completion route on TrustedRouter. DeepSeek: DeepSeek V4 Pro has more provider fallback routes, while DeepSeek: DeepSeek V4 Pro has the larger context window. Current TrustedRouter probes show DeepSeek: DeepSeek V3.1 Terminus with the lower p50 TTFT.

$1.281/1MDeepSeek: DeepSeek V3.1 Terminus cheapest route

$1.37025/1MDeepSeek: DeepSeek V4 Pro cheapest route

1415 msDeepSeek: DeepSeek V3.1 Terminus fastest measured p50 TTFT via deepinfra

1804 msDeepSeek: DeepSeek V4 Pro fastest measured p50 TTFT via novita

DeepSeek: DeepSeek V3.1 TerminusDeepSeek: DeepSeek V4 Pro

Model iddeepseek/deepseek-v3.1-terminusdeepseek/deepseek-v4-pro

Publisher DeepSeek DeepSeek

AI IQ — IQ 117#25

Context163,840 tokens1,048,576 tokens

Provider routes724

Cheapest route$1.281/1M$1.37025/1M

Privacy postureprovider posture varieshas ZDR route

Fastest measured p50 TTFT1415 ms via deepinfra1804 ms via novita

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%100.00%

Modes chat chat

DeepSeek: DeepSeek V3.1 Terminus routes

Overview7 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

DeepSeek: DeepSeek V4 Pro routes

Overview24 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
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-v3.1-terminus",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V3.1 Terminus or DeepSeek: DeepSeek V4 Pro?

Is DeepSeek: DeepSeek V3.1 Terminus or DeepSeek: DeepSeek V4 Pro cheaper?

The current cheapest TrustedRouter route is $1.281/1M for DeepSeek: DeepSeek V3.1 Terminus and $1.37025/1M for DeepSeek: DeepSeek V4 Pro. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V3.1 Terminus or DeepSeek: DeepSeek V4 Pro faster?

Current measured p50 time to first token is 1415 ms for DeepSeek: DeepSeek V3.1 Terminus and 1804 ms for DeepSeek: DeepSeek V4 Pro. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V3.1 Terminus and DeepSeek: DeepSeek V4 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-v3.1-terminus and deepseek/deepseek-v4-pro. This makes side-by-side evals possible without maintaining two provider integrations.