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There is no single fastest or cheapest LLM inference API for every workload. Speed and cost depend on the exact model and version, prompt and response lengths, concurrency, region, service tier, and the latency measure you care about. For a useful comparison, match those conditions and compare serverless token rates with dedicated endpoint costs separately.

What to compare before choosing an inference platform

Start with the request your application actually sends, not a provider-wide ranking. A short prompt and a brief answer can produce a very different result from a long context and a lengthy completion. Test the same model version, request shape, region, concurrency, and account tier wherever possible.

  • Time to first token: How long the user waits before streamed output begins.
  • Generation throughput: How quickly tokens are produced after generation starts, often reported as tokens per second.
  • Token cost: Input and output rates separately; a workload with long prompts can have a different cost leader from one dominated by generated text.
  • Fit for the application: Exact model/version, context window, tool or function calling, structured output, and required modalities.
  • Operational fit: Rate and concurrency limits, scaling behavior, cold starts, regional availability, uptime commitments, data handling, and support terms. These need to be checked for the specific product and account; they are not normalized across the services discussed here.

A latency or throughput figure on a model listing is not automatically a controlled, independent benchmark. Check how the provider or platform characterizes the number, then validate it with your own requests.

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Serverless token APIs and dedicated endpoints have different economics

Serverless inference

With a serverless API, charges are commonly tied to tokens processed. That can suit variable or bursty demand because you pay according to use rather than reserving a fixed deployment. Compare input and output rates separately, and account for the actual token mix in your application.

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Hugging Face Inference Providers pricing documentation describes access to more than 200 models through multiple providers, centralized pay-as-you-go billing, and no Hugging Face markup. It distinguishes requests routed through Hugging Face from requests made with a custom provider key; billing and account requirements differ by route. Confirm the current terms and model availability for the route you intend to use.

Together AI’s serverless inference page describes one API for open-weight models with token-based billing and says users pay for tokens they use. Its performance language is the company’s own product claim, not an independent comparison.

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Cerebras Inference is another option to test; its official pricing page is the place to check current rates. The available comparison evidence does not establish a universal cost or speed advantage for it.

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Dedicated endpoints

A dedicated deployment shifts the question from a per-token rate to the cost of allocated compute over time. Hugging Face lists Inference Endpoints separately from its Inference Providers service, with example hourly prices for CPU and GPU configurations in its Inference Endpoints catalog. Catalog examples are not a total-cost estimate for a particular workload.

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To compare a dedicated deployment with a serverless API, estimate the dedicated cost over the same period and divide it by the tokens actually served during that period. Include idle time, replica count, and the model’s observed throughput; a nominal hourly rate alone does not reveal cost per request. Dedicated capacity may make sense when demand is steady or operational control is important, while variable traffic can make token billing easier to align with usage. Measure utilization before deciding.

What the available same-model price and speed examples show

The Hugging Face supported-model comparison table separates input price, output price, latency, and throughput by model and provider. The following values are an undated snapshot from that platform table, not independently reproduced measurements or a controlled benchmark. They are specific to the listed gpt-oss-120b entries and may change.

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Provider listed Input price per million tokens Output price per million tokens Listed latency Listed throughput
Cerebras $0.35 $0.75 0.15 seconds 1,296 tokens per second
DeepInfra $0.04 $0.17 0.56 seconds 61 tokens per second
Groq $0.15 $0.75 0.34 seconds 431 tokens per second

These rows illustrate why “fastest” and “cheapest” are different questions: the lowest listed input and output rates are not attached to the highest listed throughput in this snapshot. The latency column is not a substitute for generation throughput, and the table does not establish how these providers perform on your prompts, response lengths, concurrency, region, or service tier. Check the live supported-model comparison for current entries, then run a matched test before treating any listing as a production result.

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How to run a fair comparison

  1. Choose the exact model and version. Confirm that every service offers the model you need and note any version or serving differences.
  2. Build representative requests. Use your real prompt distribution, expected context sizes, response-length targets, and any tool calls or structured-output requirements.
  3. Match the conditions. Keep region, concurrency, streaming behavior, and account/service tier consistent where possible. Record differences that cannot be matched.
  4. Measure both latency and throughput. Record time to first token and generation speed separately. Include enough repeated requests under realistic load to see variation rather than relying on one request.
  5. Calculate workload cost. Apply input and output token rates to your expected token mix for serverless services. For dedicated deployments, include hourly capacity and realistic utilization over the same period.
  6. Check production requirements. Verify rate limits, scaling and cold-start behavior, availability in your region, service commitments, data handling, and support terms directly with the provider.

Which option should you choose?

Choose a serverless API when demand varies

Token billing is a natural starting point when traffic is unpredictable, you want to try several hosted models, or you do not want to manage a deployment. Compare the exact model’s current input and output rates and test whether its latency and features meet your needs.

Evaluate a dedicated endpoint when demand is steady or control matters

A dedicated endpoint can be worth evaluating if your workload is consistently active or you need deployment control. Compare its hourly compute cost against the serverless cost for the same traffic, allowing for idle capacity and the number of replicas needed to meet demand.

Do not select on a single headline number

The reviewed materials do not establish a universal fastest or cheapest provider, nor a normalized comparison of regional performance, service-level guarantees, data handling, or support across these services. Treat provider claims and platform listings as starting points, and make the final choice using matched workload tests and the current terms for your account.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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