o4 Mini
OpenAIReleased Apr 16, 2025
OpenAI o4-mini is a compact reasoning model in the o-series, optimized for fast, cost-efficient performance while retaining strong multimodal and agentic capabilities. It supports tool use and demonstrates competitive reasoning...
- 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
- optional
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $1.10 | $0.033 | $1.13 |
| Output | $4.40 | $0.132 | $4.53 |
| Cache read | $0.275 | $0.0083 | $0.283 |
Benchmarks
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| 3Dmodels | 930 | 34% | #94 |
| Codemodels | 1025 | 46.4% | #94 |
| Data vizmodels | 1035 | 50% | #87 |
| Game devmodels | 1069 | 50% | #82 |
| UI componentsmodels | 1040 | 46.9% | #83 |
| Websitesmodels | 1028 | 47.1% | #96 |
Head-to-head preference voting. How we filter and rank
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.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/o4-mini",
"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",
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",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does o4 Mini cost via API?
- Through OpenKey, o4 Mini 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's context window?
- o4 Mini accepts up to 200K tokens of context and returns up to 100K tokens per request.
- Is o4 Mini OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "openai/o4-mini" using any OpenAI SDK — only the base URL and API key change.
- What inputs does o4 Mini support?
- o4 Mini accepts image, text, file input and produces text output. Its knowledge cutoff is Jun 30, 2024.
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