What is a flat-rate AI API and how does it compare with per-token pricing?

Last updated October 26, 2026 by the APIClaw team

A flat-rate AI API charges a fixed monthly price for a daily request quota instead of a per-token bill. APIClaw offers it from $19 a month for 500 requests a day, through one OpenAI-compatible key for Claude, GPT, DeepSeek, Qwen, Kimi and GLM. Tokens per request are unlimited; requests per day are not.

What a flat-rate AI API is

Most AI APIs bill per token. Every word you send and every word the model returns is metered, and the invoice at the end of the month is the sum. A flat-rate AI API replaces the meter with a fixed price. You pay one amount per month and receive a quota of requests per day. How large each request is does not change the bill.

On APIClaw the rule is simple. Tokens per request are unlimited, apart from the model's own limit, which goes up to a 1M-token context. Requests per day are not unlimited: each plan has a daily quota that resets at 00:00 UTC. Both halves matter. A flat rate does not mean infinite calls. It means the price is known before the month starts.

Why per-token billing is hard to forecast

Two requests that look the same in your code can differ by a factor of fifty in cost. A chatbot that includes conversation history gets more expensive with every turn. A summarizer costs more on a long contract than a short memo. An agent that reads files, edits them and re-reads them sends the same context again and again. In each case the bill depends on text length, which you do not fully control.

That variability pushes engineers into prompt trimming and context pruning, not because it improves the product, but because the billing model punishes long inputs. With a flat rate the question changes from "how many tokens will this use" to "how many requests a day do we need", and the second question is far easier to answer from your own logs.

How APIClaw's flat-rate plans work

Every plan lasts 30 days, can be cancelled at any time, and has a daily request quota.

If you need more than 8,000 requests a day, a custom plan is available through Telegram support. A free trial gives 50 requests with no card at /ui/signup/.

Request weights

Not every model counts as one request. A heavier model takes more of the quota per call, and the weights are fixed and published in the model hub.

The arithmetic is easy. On the $39 Pro plan, 1,000 requests a day is 1,000 DeepSeek calls, or 500 Claude Sonnet calls, or 333 GPT-6 Sol calls. You can mix them: 100 Claude Opus calls (300 requests) and 350 DeepSeek calls fit comfortably in a day on that plan.

Flat rate compared with per-token billing

Provider prices are listed on pages such as OpenAI's API pricing and Claude pricing. Check them for current numbers before you decide.

When a flat rate is worth it

A flat plan pays off when each request is large or when requests are frequent: coding agents that resend the whole conversation every turn, document analysis with long inputs, batch jobs that run over many files, and internal tools used all day by a team. It also removes the hesitation people feel when every experiment shows up on an invoice.

It is the wrong tool when your usage is tiny. At a few dozen short requests a day, per-token billing is often cheaper than $19 a month. It is also not a fit if you need a model that is not in the catalog. The honest way to decide is to run the 50-request trial, note your average request count per working day, and compare it with your last token bill.

Use it with the OpenAI SDK

APIClaw exposes the OpenAI Chat Completions and Responses formats at https://apiclaw.biz/v1. Existing OpenAI code needs a new base URL and key.

from openai import OpenAI

client = OpenAI(base_url="https://apiclaw.biz/v1", api_key="sk-your-apiclaw-key")
response = client.chat.completions.create(
    model="deepseek-v4-pro",
    messages=[{"role": "user", "content": "Summarize this document."}],
)
print(response.choices[0].message.content)

The same call in TypeScript:

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://apiclaw.biz/v1",
  apiKey: process.env.APICLAW_API_KEY,
});

const response = await client.chat.completions.create({
  model: "claude-sonnet-5-5",
  messages: [{ role: "user", content: "Draft a short status email." }],
});
console.log(response.choices[0].message.content);

To change models, change the model string. The price stays the plan price and only the weight changes. The catalog covers Claude, GPT, Gemini, DeepSeek, Qwen, Kimi, GLM, Mistral, Llama, Cohere and Grok families, and the model hub shows exactly which IDs are live for your account. For the broader picture of using one key across tools, read one API key for all models.

Claude Code is the exception to the base URL rule. It uses the Anthropic Messages format and takes https://apiclaw.biz without /v1. The Claude Code guide and the Cursor guide have the exact settings.

Planning your daily quota

To choose a plan, estimate the requests per day of your busiest normal day, multiply each by its model weight, and add some headroom. A developer who uses an agent all day on claude-sonnet-5-5 might average a few hundred calls, which is a few hundred times 2. A team with several people sharing one account adds those up. The dashboard shows your keys and usage, so after a week on the trial or a small plan you can read the real number instead of guessing.

If you outgrow a plan, move up a tier. Because plans run for 30 days, you can also choose a bigger one at the next cycle if the first was too generous.

Troubleshooting

401 Unauthorized. The key is wrong or has stray spaces. Copy it again from the dashboard and use it as the bearer token.

404 or model not found. The model ID is not exact. Use an ID from the model hub, such as claude-sonnet-5-5 or deepseek-v4-flash. Older example names like "gpt-4o" or "claude" are not valid IDs here. Cursor needs the apiclaw/ prefix. Claude Code needs the base URL without /v1.

429 Too Many Requests. The daily quota is used. It resets at 00:00 UTC. Use a lighter model, wait, or upgrade.

Different output than expected. Models differ. Compare the same prompt on two model IDs before you decide which one fits a task.

Payment and independence

Payment is by cryptocurrency through NOWPayments, and no card is needed. See the guide to paying for an AI API with crypto. APIClaw is independent and not affiliated with Anthropic, OpenAI, Google or Cursor. APIClaw routes requests to models available through publicly available sources and provider APIs. A fuller write-up of the same pricing model is on the flat-rate OpenAI-compatible API page.