OpenAI compatible API · Attested · Public status

Anthropic: Claude Sonnet 4.5 vs DeepSeek: DeepSeek V4 Flash 0731

Claude Sonnet 4.5 vs DeepSeek V4 Flash 0731: 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.

$18.99/1MAnthropic: Claude Sonnet 4.5 cheapest route

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

2290 msAnthropic: Claude Sonnet 4.5 fastest measured p50 TTFT via anthropic

1345 msDeepSeek: DeepSeek V4 Flash 0731 fastest measured p50 TTFT via pearl

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.

Anthropic: Claude Sonnet 4.5DeepSeek: DeepSeek V4 Flash 0731

Model idanthropic/claude-sonnet-4.5deepseek/deepseek-v4-flash-0731

Publisher Anthropic DeepSeek

AI IQ — —

Context1,000,000 tokens1,048,576 tokens

Credits provider routes122

Cheapest route$18.99/1M$0.142425/1M

Cached input$0.3165/1M$0.01/1M to $0.135251/1M

Privacy postureprovider posture varieshas ZDR route

Fastest measured p50 TTFT2290 ms via anthropic1345 ms via pearl

Highest measured throughputnot enough data91 tok/s via baseten

Recent route uptime range100.00%0.00% to 100.00%

Modes chat messages chat

Anthropic: Claude Sonnet 4.5 routes

Overview1 Credits routes
BenchmarksTrustedRouter and external sources

DeepSeek: DeepSeek V4 Flash 0731 routes

Overview22 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="anthropic/claude-sonnet-4.5",
    messages=messages,
)

Questions

Which should I use, Anthropic: Claude Sonnet 4.5 or DeepSeek: DeepSeek V4 Flash 0731?

Is Anthropic: Claude Sonnet 4.5 or DeepSeek: DeepSeek V4 Flash 0731 cheaper?

The current cheapest TrustedRouter route is $18.99/1M for Anthropic: Claude Sonnet 4.5 and $0.142425/1M for DeepSeek: DeepSeek V4 Flash 0731. The comparison uses current catalog prices and updates as provider pricing changes.

Is Anthropic: Claude Sonnet 4.5 or DeepSeek: DeepSeek V4 Flash 0731 faster?

Current measured p50 time to first token is 2290 ms for Anthropic: Claude Sonnet 4.5 and 1345 ms for DeepSeek: DeepSeek V4 Flash 0731. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Anthropic: Claude Sonnet 4.5 and DeepSeek: DeepSeek V4 Flash 0731 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between anthropic/claude-sonnet-4.5 and deepseek/deepseek-v4-flash-0731. This makes side-by-side evals possible without maintaining two provider integrations.