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OpenKey

GPT-5.4 Image 2

OpenAIReleased Apr 21, 2026

[GPT-5.4](https://openrouter.ai/openai/gpt-5.4) Image 2 combines OpenAI's GPT-5.4 model with state-of-the-art image generation capabilities from GPT Image 2. It enables rich multimodal workflows, allowing users to seamlessly move between reasoning, coding, and...

Try in playground
Context window
272K tokens
Max output
128K tokens
Input
image, text, file
Output
image, text
Tokenizer
GPT
Released
Apr 21, 2026
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$8.00$0.240$8.24
Output$15.00$0.450$15.45
Cache read$2.00$0.060$2.06

Supported parameters

  • frequency_penalty
  • include_reasoning
  • logit_bias
  • logprobs
  • max_tokens
  • presence_penalty
  • reasoning
  • response_format
  • seed
  • stop
  • structured_outputs
  • top_logprobs

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model openai/gpt-5.4-image-2.

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/gpt-5.4-image-2",
    "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/gpt-5.4-image-2",
    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/gpt-5.4-image-2",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does GPT-5.4 Image 2 cost via API?
Through OpenKey, GPT-5.4 Image 2 costs $8.24 per 1M input tokens and $15.45 per 1M output tokens. That is the provider price ($8.00 / $15.00) plus a flat 3% fee — nothing else.
What is GPT-5.4 Image 2's context window?
GPT-5.4 Image 2 accepts up to 272K tokens of context and returns up to 128K tokens per request.
Is GPT-5.4 Image 2 OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "openai/gpt-5.4-image-2" using any OpenAI SDK — only the base URL and API key change.
What inputs does GPT-5.4 Image 2 support?
GPT-5.4 Image 2 accepts image, text, file input and produces image, text output.

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