OpenAI Reasoning New

o4 Mini

Compact reasoning model

200K Context window

Text + Vision Modalities

Reasoning Specialty

Yes Streaming

Get API key — free View docs →

Model ID o4-mini-2025-04-16 /v1/chat/completions

Our pricing

Input tokens per 1M tok

$0.880

Output tokens per 1M tok

$3.52

Pay-as-you-go · No minimums · Cancel anytime

OpenAI-compatible ( api.belugapi.com/v1)

Start for free →

No credit card required to test

Capabilities

What o4 Mini
can do for you.

Native API parity with the official provider — every feature surfaced one-to-one.

Streaming

Server-sent events out of the box

Vision

Analyze images, charts & documents

Reasoning

Deep chain-of-thought for hard tasks

Long context

200K+ tokens of working memory

Integration

2-line migration.
Zero friction.

BelugAPI is 100 % compatible with the OpenAI SDK. Point base_url to our endpoint and you're done — no refactoring, no learning curve.

Same request & response schema

Python · Node.js · REST · Go · Ruby

Streaming, tool-calling, structured output

Automatic failover & load balancing

Python

from openai import OpenAI

client = OpenAI(
  api_key=bel-your-key,
  base_url=https://api.belugapi.com/v1
)

response = client.chat.completions.create(
  model=o4-mini-2025-04-16,
  messages=[{"role": user, "content": Hello!}]
)
print(response.choices[0].message.content)

Node.js

import OpenAI from openai;

const client = new OpenAI({
  apiKey:  bel-your-key,
  baseURL: https://api.belugapi.com/v1,
});

const res = await client.chat.completions.create({
  model:    o4-mini-2025-04-16,
  messages: [{ role: user, content: Hello! }],
});
console.log(res.choices[0].message.content);

cURL

curl https://api.belugapi.com/v1/v1/chat/completions \
  -H Authorization: Bearer bel-your-key \
  -H Content-Type: application/json \
  -d {"model":"o4-mini-2025-04-16","messages":[{"role":"user","content":"Hello!"}]}

Highlights

Built for production.

Reasoning

Fast

Complete guide

Everything about
o4 Mini.

Specifications, pricing, capabilities, and integration tips — kept up to date with every OpenAI release.

By OpenAI 2 min read Updated May 2026

Compact reasoning model

Overview

o4 Mini is a cutting-edge ai reasoning model developed by OpenAI, designed to push the boundaries of artificial intelligence-powered content generation.

This model excels in reasoning, fast, making it a top choice for professionals seeking high-quality, scalable AI solutions. Whether you're building production applications, researching new AI capabilities, or creating stunning visual content, o4 Mini delivers industry-leading performance and reliability.

Key Specifications

Specification	Details
Model Name	o4 Mini
Provider	OpenAI
Category	AI Reasoning Model
Model Type	Reasoning

Pricing

Input: $0.88/M tokens
Output: $3.52/M tokens

Key Features & Capabilities

Reasoning: Advanced capability for professional-grade output.
Fast: Advanced capability for professional-grade output.

Use Cases & Applications

Complex problem solving
Scientific research assistance
Mathematical computation
Multi-step workflow automation

Frequently asked questions

What is o4 Mini best used for?

o4 Mini excels at reasoning, fast, making it ideal for professional and enterprise applications.

Who developed o4 Mini?

o4 Mini was developed by OpenAI, a leading AI research and development company.

How do I integrate o4 Mini into my application?

You can integrate o4 Mini via its official API endpoint using standard HTTP requests with your API key. SDKs are available for Python, JavaScript, and other languages.

What is the pricing model for o4 Mini?

Pricing is based on input. Check the pricing section above for detailed rates.

Ready to ship? Start using o4 Mini in under 30 seconds.

Get free API key