GPT-Image 2

Vendor: OpenAI Model ID: gpt-image-2 Capability: 1024² – 4096² · photorealism · prompt-following · text-in-image Pricing: per image, photoreal tier (live rate) GPT-Image 2 is OpenAI’s photoreal generator. The thing that distinguishes it from Nano Banana is prompt following — when your brief reads “the kettle on the LEFT, mug on the RIGHT, steam rising from both”, GPT-Image 2 respects spatial relationships better than most photoreal alternatives. For pure material fidelity, Nano Banana Pro and 2 still have an edge; for instruction adherence, this is usually the right call.

Request

curl https://llm.bytespike.ai/v1/images/generations \
  -H "Authorization: Bearer $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "gpt-image-2",
    "prompt": "A kettle on the left and a mug on the right, both steaming, on a marble counter",
    "size": "1024x1024",
    "quality": "high"
  }'

Body parameters

Field	Type	Required	Default	Notes
`model`	string	yes	—	`gpt-image-2`
`prompt`	string	yes	—	English-tuned.
`size`	string	no	`1024x1024`	Supported: `1024x1024`, `1024x1536`, `1536x1024`, `2048x2048`, `4096x4096`.
`n`	integer	no	1	1–4 images.
`quality`	string	no	`"medium"`	`"low"` / `"medium"` / `"high"` / `"auto"`.
`style`	string	no	`"natural"`	`"natural"` / `"vivid"`.
`output_format`	string	no	`"png"`	`"png"` / `"webp"` / `"jpeg"`.
`output_compression`	integer	no	—	0–100, only for `webp` / `jpeg`.

Response

{
  "created": 1715174400,
  "data": [
    {
      "url": "https://cdn.bytespike.ai/img/...",
      "revised_prompt": "..."
    }
  ]
}

URLs pre-signed, 24h expiry.

Code examples

curl https://llm.bytespike.ai/v1/images/generations \
  -H "Authorization: Bearer $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{"model": "gpt-image-2", "prompt": "Kettle and mug...", "quality": "high"}'

from openai import OpenAI

client = OpenAI(base_url="https://llm.bytespike.ai/v1", api_key="$BYTESPIKE_API_KEY")
resp = client.images.generate(
    model="gpt-image-2",
    prompt="A kettle on the left and a mug on the right, both steaming, on a marble counter",
    size="1024x1024",
    quality="high",
)
print(resp.data[0].url)

import OpenAI from "openai"

const client = new OpenAI({
  baseURL: "https://llm.bytespike.ai/v1",
  apiKey: process.env.BYTESPIKE_API_KEY,
})
const resp = await client.images.generate({
  model: "gpt-image-2",
  prompt: "A kettle on the left and a mug on the right, both steaming, on a marble counter",
  size: "1024x1024",
  quality: "high",
})
console.log(resp.data[0].url)

Errors

Code	Trigger	Billed?
400 / 401 / 402 / 403	Standard	No
451	Prompt blocked by upstream safety	No
5xx	Upstream issue	No (auto-retry)

When to use

Prompts that specify spatial relationships, counts, or composition.
Briefs that mix text descriptions with explicit constraints.
For more material / lighting fidelity, see Nano Banana 2 or Nano Banana Pro.
For the compliance-tier variant, see GPT-Image 2 Official.

Limits

Limit	Value
Max output resolution	4096×4096
Max images per call (`n`)	4
Supports init image (img2img)	No
Supports `quality` modifier	Yes
Supports `style` modifier	Yes
Sync?	Yes (≤30s typical, longer at high quality)
Avg latency for 1024² high	12-18s

API Reference

Protocol endpoints

OpenAI

Anthropic

DeepSeek

Moonshot

Zhipu

MiniMax

Image

Video

Account & billing

Utility

Request

Body parameters

Response

Code examples

Errors

When to use

Limits

​Request

​Body parameters

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​Limits

Request

Body parameters

Response

Code examples

Errors

When to use

Limits