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OpenKey

o3

OpenAIReleased Apr 16, 2025

o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....

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 tokensProvider+ 3% feeYou pay
Input$2.00$0.060$2.06
Output$8.00$0.240$8.24
Cache read$0.500$0.015$0.515

Benchmarks

Design Arena

CategoryEloWin rateRank
Codemodels106951.9%#85
Data vizmodels120048.1%#49
Game devmodels110056.9%#78
UI componentsmodels107353.3%#79
Websitesmodels107953.8%#87

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/o3.

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/o3",
    "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/o3",
    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/o3",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does o3 cost via API?
Through OpenKey, o3 costs $2.06 per 1M input tokens and $8.24 per 1M output tokens. That is the provider price ($2.00 / $8.00) plus a flat 3% fee — nothing else.
What is o3's context window?
o3 accepts up to 200K tokens of context and returns up to 100K tokens per request.
Is o3 OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "openai/o3" using any OpenAI SDK — only the base URL and API key change.
What inputs does o3 support?
o3 accepts image, text, file input and produces text output. Its knowledge cutoff is Jun 30, 2024.

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