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FastGen Cloud

FastGen Cloud vs Segmind

Segmind hosts a large set of open generative models with per-model endpoints and credit-based billing. FastGen Cloud is narrower and more opinionated: fewer models, one contract, a prepaid USD balance and published per-output rates.

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Side by side

DimensionFastGen CloudSegmind
CatalogueA curated image and video lineup, one strong option per task.A large catalogue of hosted open models and pipelines.
API shapeOne REST contract shared by every model and operation.Per-model endpoints with their own parameter sets.
Billing unitUS dollars per image or per second of video, published per model.Credit-based, consumed per call.
Spend controlPrepaid balance — a runaway loop stops when the balance hits zero.Governed by your credit balance and plan.
Async modelEvery operation is a job: 202, then poll or signed webhook, with idempotent replay.Varies by endpoint.
Custom subjectsServer-side character training, referenced by id; no weights ever cross the API.Varies by pipeline.

Comparison of platform design, not of prices — Segmind sets its own rates and changes them independently, so check its current pricing page before deciding. Last reviewed 20 August 2026.

Fewer models, on purpose

A large catalogue pushes the selection problem onto you: which of eleven near-identical finetunes is the one to ship on, and what happens to your output when it is deprecated. A curated lineup answers that by picking one and keeping the id stable.

The trade is real. If you want to benchmark many checkpoints against each other, a broad catalogue serves you better.

Dollars rather than credits

Rates are published in US dollars per output, and the wallet is a dollar balance in micro-USD. There is no credit-to-dollar conversion to reason about when you are working out what a generation costs you, which matters when you are pricing your own product on top.

What migrating actually involves

The shape is the same everywhere: authenticate, submit a job, wait for a callback, download the output. In practice a migration is one client module and a model-name mapping.

submit + wait
const res = await fetch("https://api.fastgencloud.com/v1/images/generations", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.FASTGEN_API_KEY}`,
    "Content-Type": "application/json",
    "Idempotency-Key": requestId,
  },
  body: JSON.stringify({ model: "general-image", prompt, size: "1024x1024" }),
});
const job = await res.json();          // 202 → { id, status: "queued" }

// then either poll GET /v1/jobs/{id}, or pass webhook_url and get a signed callback

How billing works here

Money is a prepaid balance in your account. You top it up with a card, each job debits it at submit time, and a failed job is refunded automatically — there is no invoice at the end of the month and no way to run up a bill you did not intend.

Rates are per image or per second of video, published on the pricing page. Images above 1 megapixel bill pro rata by pixel count. Outputs are retained for up to 7 days.

Frequently asked questions

Do you offer dedicated or always-warm endpoints?
Not currently. Every model runs on shared serverless capacity, which means a cold start when a model has been idle. If sustained warm throughput is a hard requirement for you, get in touch before you build.
How many images can I request at once?
Up to 4 per request on the image models. Submit concurrent jobs for more — each gets its own id and its own webhook.
Is there a free tier?
There is no free generation tier today. Accounts get two free character training slots; generation is billed from a prepaid balance from the first image.

Related

Start generating

Create an account, add a prepaid balance, and call the API with a key from the console. No subscription, no minimum, no per-seat pricing.

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