How do I use GPT-4o Mini through YepAPI?

Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.

OpenAIText Generation/v1/ai/chat

GPT-4o Mini

Access GPT-4o Mini through one API key. Fast, cheap, and OpenAI-compatible.

OpenAI's most cost-effective model. Fast responses, great for classification, extraction, and lightweight chat tasks.

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2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see GPT-4o Mini respond in real time.

POST/v1/ai/chatopenai/gpt-4o-mini

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Context Window

128K tokens

Max Output

16K tokens

Input Price

$0.21 / 1M tokens

Output Price

$0.84 / 1M tokens

Strengths

✓

Cost-effective

At $0.21 per 1M input and $0.84 per 1M output tokens, it's OpenAI's cheapest GPT-4o-class model, suited to high-volume pipelines where per-call cost dominates.

✓

Fast responses

Low time-to-first-token makes it a good fit for interactive UIs, autocomplete, and tight latency budgets that don't need a flagship model.

✓

Classification & extraction

Reliable on labeling, sentiment, entity extraction, and routing tasks where the 128K context window comfortably holds documents to be processed.

✓

Structured output

Follows JSON and schema-constrained formats well, returning up to 16,384 output tokens per call for batch tagging and parsing jobs.

Quick start

Copy this snippet and start making calls with GPT-4o Mini.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "openai/gpt-4o-mini",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Why use GPT-4o Mini through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

GPT-4o Mini API — pricing, context window & access

GPT-4o Mini is OpenAI's small, low-cost member of the GPT-4o family, built for tasks where you need GPT-4o-style behavior at a fraction of the price. It pairs a 128K-token context window with up to 16,384 output tokens per response.

Through YepAPI you call GPT-4o Mini on an OpenAI-compatible endpoint with one key — the same key that also reaches GPT-4o, Claude, Gemini and the SEO, SERP and scraping endpoints.

What is GPT-4o Mini?

GPT-4o Mini is OpenAI's most cost-effective model, the lightweight sibling of the flagship GPT-4o. It keeps the same 128K-token context window but is tuned for speed and price rather than peak reasoning, which makes it the default choice for high-throughput, well-defined work: classification, extraction, content moderation, routing, and lightweight chat. It sits below GPT-4o in OpenAI's lineup as the model you reach for when a task is repetitive and volume — not maximum intelligence — is the constraint that matters.

Build with GPT-4o Mini via YepAPI

YepAPI exposes GPT-4o Mini through the OpenAI-compatible /v1/ai/chat endpoint. If you already speak the chat-completions format, point your base URL at YepAPI, drop in your key, and set the model string to gpt-4o-mini. Switching to GPT-4o, Claude Haiku, or Gemini Flash later is a one-string change — no SDK swap, no new credentials. The same key also covers search and scraping endpoints, so a whole pipeline runs on one account.

GPT-4o Mini API pricing — $0.21 / 1M input, $0.84 / 1M output

GPT-4o Mini costs $0.21 per 1M input tokens and $0.84 per 1M output tokens through YepAPI. That makes it one of the cheapest capable models available and ideal for jobs measured in millions of tokens — tagging support tickets, parsing scraped pages, or batch-summarizing records. Because output is priced at four times input, prompts that emit short structured results stay especially economical. You pay per token used, with no minimums.

GPT-4o Mini for classification & extraction

GPT-4o Mini shines on structured, repeatable language tasks. Feed it documents inside the 128K window and ask for sentiment labels, extracted fields, or routing decisions, and it returns clean JSON at high speed. For pipelines that process large volumes of short inputs — moderation queues, lead scoring, data normalization — its low price and fast responses let you run it at scale without the cost of a frontier model.

Try GPT-4o Mini free

New YepAPI accounts get $5 in free credit with no card required. At $0.21 per 1M input tokens, that's enough to run real classification and extraction workloads before you decide. Sign up, grab your key, and call GPT-4o Mini in minutes.