OpenAI compatible API · Attested · Public status

Anthropic: Claude Opus 5.5 vs DeepSeek: DeepSeek V4.1 Flash

Claude Opus 5.5 vs DeepSeek V4.1 Flash: 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 V4.1 Flash has the lower published input-plus-output rate, more Credits provider routes and the larger context window. There is not enough recent probe data to compare speed.

$25.32/1MAnthropic: Claude Opus 5.5 cheapest route

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

not enough dataAnthropic: Claude Opus 5.5 fastest measured p50 TTFT

813 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via pearl

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.

Anthropic: Claude Opus 5.5DeepSeek: DeepSeek V4.1 Flash

Model idanthropic/claude-opus-5.5deepseek/deepseek-v4.1-flash

Publisher Anthropic DeepSeek

AI IQ IQ 141#2 IQ 124#22

Context1,000,000 tokens1,048,576 tokens

Credits provider routes118

Cheapest route$25.32/1M$0.1266/1M

Cached input$0.211/1M$0.01/1M to $0.146118/1M

Privacy postureprovider posture varieshas provider E2EE route

Fastest measured p50 TTFTnot enough data813 ms via pearl

Highest measured throughputnot enough data119 tok/s via novita

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

Modes chat messages chat decide

Anthropic: Claude Opus 5.5 routes

Overview1 Credits routes

DeepSeek: DeepSeek V4.1 Flash routes

Overview18 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-opus-5.5",
    messages=messages,
)

Questions

Which should I use, Anthropic: Claude Opus 5.5 or DeepSeek: DeepSeek V4.1 Flash?

DeepSeek V4.1 Flash has the lower published input-plus-output rate, more Credits provider routes and the larger context window. There is not enough recent probe data to compare speed.

Is Anthropic: Claude Opus 5.5 or DeepSeek: DeepSeek V4.1 Flash cheaper?

The current cheapest TrustedRouter route is $25.32/1M for Anthropic: Claude Opus 5.5 and $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is Anthropic: Claude Opus 5.5 or DeepSeek: DeepSeek V4.1 Flash faster?

Current measured p50 time to first token is not enough data for Anthropic: Claude Opus 5.5 and 813 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 Anthropic: Claude Opus 5.5 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 anthropic/claude-opus-5.5 and deepseek/deepseek-v4.1-flash. This makes side-by-side evals possible without maintaining two provider integrations.