GPT-5 Image
OpenAIReleased Oct 14, 2025
[GPT-5](https://openrouter.ai/openai/gpt-5) Image combines OpenAI's GPT-5 model with state-of-the-art image generation capabilities. It offers major improvements in reasoning, code quality, and user experience while incorporating GPT Image 1's superior instruction following,...
- Context window
- 400K tokens
- Max output
- 128K tokens
- Input
- image, text, file
- Output
- image, text
- Tokenizer
- GPT
- Released
- Oct 14, 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 tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $10.00 | $0.300 | $10.30 |
| Output | $10.00 | $0.300 | $10.30 |
| Cache read | $1.25 | $0.037 | $1.29 |
Benchmarks
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| graphicdesignmodels | 1212 | 51.9% | #6 |
| imagemodels | 1219 | 54.1% | #7 |
| logomodels | 1223 | 54.2% | #6 |
Head-to-head preference voting. How we filter and rank
Supported parameters
- frequency_penalty
- include_reasoning
- logit_bias
- logprobs
- max_tokens
- presence_penalty
- reasoning
- response_format
- seed
- stop
- structured_outputs
- temperature
- top_logprobs
- top_p
Call it
OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model openai/gpt-5-image.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-5-image",
"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-image",
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-image",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does GPT-5 Image cost via API?
- Through OpenKey, GPT-5 Image costs $10.30 per 1M input tokens and $10.30 per 1M output tokens. That is the provider price ($10.00 / $10.00) plus a flat 3% fee — nothing else.
- What is GPT-5 Image's context window?
- GPT-5 Image accepts up to 400K tokens of context and returns up to 128K tokens per request.
- Is GPT-5 Image OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "openai/gpt-5-image" using any OpenAI SDK — only the base URL and API key change.
- What inputs does GPT-5 Image support?
- GPT-5 Image accepts image, text, file input and produces image, text output.
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