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OpenKey

o4 Mini High

OpenAIReleased Apr 16, 2025

OpenAI o4-mini-high is the same model as [o4-mini](/openai/o4-mini) with reasoning_effort set to high. OpenAI o4-mini is a compact reasoning model in the o-series, optimized for fast, cost-efficient performance while retaining...

Try in playground
Context window
200K tokens
Max output
100K tokens
Input
image, text, file
Output
text
Tokenizer
GPT
Knowledge cutoff
Jun 30, 2024
Released
Apr 16, 2025
Reasoning
always on

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$1.10$0.033$1.13
Output$4.40$0.132$4.53
Cache read$0.275$0.0083$0.283

Supported parameters

  • include_reasoning
  • max_tokens
  • reasoning
  • response_format
  • seed
  • structured_outputs
  • tool_choice
  • tools

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model openai/o4-mini-high.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/o4-mini-high",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="openai/o4-mini-high",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_API_KEY,
});

const completion = await client.chat.completions.create({
  model: "openai/o4-mini-high",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does o4 Mini High cost via API?
Through OpenKey, o4 Mini High costs $1.13 per 1M input tokens and $4.53 per 1M output tokens. That is the provider price ($1.10 / $4.40) plus a flat 3% fee — nothing else.
What is o4 Mini High's context window?
o4 Mini High accepts up to 200K tokens of context and returns up to 100K tokens per request.
Is o4 Mini High OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "openai/o4-mini-high" using any OpenAI SDK — only the base URL and API key change.
What inputs does o4 Mini High support?
o4 Mini High accepts image, text, file input and produces text output. Its knowledge cutoff is Jun 30, 2024.

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