OpenAIFastUltra

OpenAI o4-mini

Fast, cost-effective reasoning model optimized for coding and STEM tasks. Provides strong reasoning at a fraction of the cost of larger reasoning models.

2 credits

per 1K tokens (avg)

Optimized for coding/STEM

200K context window

100K max output tokens

Fast reasoning

Cost-effective reasoning

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txt

Model Specifications

Context Window

200K

tokens

Max Output

100K

tokens

Training Cutoff

2025-03

Compatible SDK

OpenAI

Capabilities

Vision

Function Calling

Streaming

JSON Mode

System Prompt

Token Pricing (per 1M tokens)

Token Type	Credits	USD Equivalent
Input Tokens	2,200	$2.20
Output Tokens	8,800	$8.80

* 1 credit ≈ $0.001 (actual charges may vary based on usage)

Quick Start

curl -X POST "https://api.core.today/llm/openai/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer cdt_your_api_key" \
  -d '{
  "model": "o4-mini",
  "messages": [
    {
      "role": "user",
      "content": "Review this code and suggest improvements:\n\ndef fib(n):\n    if n <= 1: return n\n    return fib(n-1) + fib(n-2)"
    }
  ],
  "max_completion_tokens": 16000,
  "reasoning_effort": "medium"
}'

Parameters

Parameter	Type	Required	Default	Description
`messages`	array	Yes	-	Array of message objects
`max_completion_tokens`	integer	No	-	Maximum tokens for completion
`reasoning_effort`	string	No	-	Reasoning depth level minimallowmediumhigh

Examples

Code Review

Review and improve code

curl -X POST "https://api.core.today/llm/openai/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer cdt_your_api_key" \
  -d '{
  "model": "o4-mini",
  "messages": [
    {
      "role": "user",
      "content": "Review this code and suggest improvements:\n\ndef fib(n):\n    if n <= 1: return n\n    return fib(n-1) + fib(n-2)"
    }
  ],
  "max_completion_tokens": 16000,
  "reasoning_effort": "medium"
}'