OpenAI · MultimodalReleased 2025-04-16

o4-mini-fast

openai/o4-mini-fast id

OpenAI's o4-mini delivers fast, cost-efficient reasoning with exceptional performance for its size, particularly excelling in math (best-performing on AIME benchmarks), coding, and visual tasks.

Tool useReasoningChatWeb searchStructured output

Type

Use o4-mini-fast

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'openai/o4-mini-fast',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })

200K

CONTEXT WINDOW

100K

MAX OUTPUT

$2.20/M

INPUT · PER M

$8.80/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$2.20/M
Output	$8.80/M
Cache read	$0.550/M

Honest list pricesHow we calculate prices

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$11.00/M
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gpt-6-sol-fastGPT-6 Sol is OpenAI's reasoning model for complex coding and agentic workflows. It accepts text and images, generates text, and supports a 1,050,000-token context window with up to 128,000 output tokens. Configurable reasoning effort, structured outputs, prompt caching, and Responses API tools make it suited to software development and multi-step automation.TOOLSREASONINGJSONWEB
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Input
$4.40/M
Output
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Context
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FAQ · O4-MINI-FAST

Frequently asked

01 / 04

How do I call o4-mini-fast from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘openai/o4-mini-fast’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does o4-mini-fast cost?

Input: $2.20/M per million tokens. Output: $8.80/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for o4-mini-fast?

o4-mini-fast supports a context window of 200K tokens, with a maximum output of 100K tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try o4-mini-fast in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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