OpenAI compatible API · Attested · Public status

OpenAI: GPT-5.4 Mini vs OpenAI: GPT-5.5

GPT-5.4 Mini vs GPT-5.5: 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

OpenAI: GPT-5.4 Mini has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: GPT-5.4 Mini has more provider fallback routes, while OpenAI: GPT-5.5 has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

$5.53875/1MOpenAI: GPT-5.4 Mini cheapest route

$36.925/1MOpenAI: GPT-5.5 cheapest route

854 msOpenAI: GPT-5.4 Mini fastest measured p50 TTFT via openai

not enough dataOpenAI: GPT-5.5 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.

OpenAI: GPT-5.4 MiniOpenAI: GPT-5.5

Model idopenai/gpt-5.4-miniopenai/gpt-5.5

Publisher OpenAI OpenAI

AI IQ IQ 112#51 IQ 133#6

Context400,000 tokens1,050,000 tokens

Credits provider routes22

Cheapest route$5.53875/1M$36.925/1M

Cached input$0.079125/1M$0.5275/1M to $1.055/1M

Privacy posturehas ZDR routehas ZDR route

Fastest measured p50 TTFT854 ms via openainot enough data

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%100.00%

Modes chat chat

OpenAI: GPT-5.4 Mini routes

Overview2 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

OpenAI: GPT-5.5 routes

Overview2 Credits routes
PricingInput, cached input, and output rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Related comparisons

Browse every comparison

MoonshotAI: Kimi K2.6 vs OpenAI: GPT-5.4 Mini21 combined provider routes
DeepSeek: DeepSeek V4 Pro 0423 vs OpenAI: GPT-5.518 combined provider routes

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="openai/gpt-5.4-mini",
    messages=messages,
)

Questions

Which should I use, OpenAI: GPT-5.4 Mini or OpenAI: GPT-5.5?

Is OpenAI: GPT-5.4 Mini or OpenAI: GPT-5.5 cheaper?

The current cheapest TrustedRouter route is $5.53875/1M for OpenAI: GPT-5.4 Mini and $36.925/1M for OpenAI: GPT-5.5. The comparison uses current catalog prices and updates as provider pricing changes.

Is OpenAI: GPT-5.4 Mini or OpenAI: GPT-5.5 faster?

Current measured p50 time to first token is 854 ms for OpenAI: GPT-5.4 Mini and not enough data for OpenAI: GPT-5.5. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test OpenAI: GPT-5.4 Mini and OpenAI: GPT-5.5 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between openai/gpt-5.4-mini and openai/gpt-5.5. This makes side-by-side evals possible without maintaining two provider integrations.