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Documentation Index

Fetch the complete documentation index at: https://docs.bettertoken.ai/llms.txt

Use this file to discover all available pages before exploring further.

Release date: April 29, 2026 BetterToken has added the gpt-image-2 image generation model entry. Check the model plaza for the currently available model ID, then call it through the OpenAI-compatible image generation API. OpenAI introduced ChatGPT Images 2.0 on April 21, 2026 and lists gpt-image-2 as the latest GPT Image model in its developer docs. OpenAI describes GPT Image 2 as a model for fast, high-quality image generation and editing, with text and image input, image output, flexible sizes, and high-fidelity image inputs.

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Highlights

  • Higher image quality: OpenAI marks GPT Image 2 as its highest-performance image generation model, suited for polished visual assets
  • More flexible sizes: gpt-image-2 supports more valid image dimensions, including common square, landscape, portrait, 2K, and 4K use cases; sizes above 2K are currently experimental
  • Higher-fidelity image input: In image editing and reference-image workflows, gpt-image-2 processes image inputs at high fidelity, useful for product photos, portraits, and brand assets
  • Stronger text and complex information: OpenAI’s system card says ChatGPT Images 2.0 improves world knowledge, instruction following, dense text, and complex detail generation
  • Streaming partial images: The Image API can return partial images through stream and partial_images, making product experiences feel more responsive

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Good use cases

  • Product launch posters, campaign assets, and social images
  • Illustrations for docs, blogs, and long-form articles
  • Visual concept drafts for apps, websites, and SaaS interfaces
  • Product images, advertising images, and brand direction exploration
  • Visual content that includes Chinese or multilingual text

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API setup

For the OpenAI-compatible protocol, use:
SettingValue
Base URLhttps://www.bettertoken.ai/v1
AuthenticationAuthorization: Bearer YOUR_API_KEY
Model IDgpt-image-2
EndpointPOST /v1/images/generations
curl https://www.bettertoken.ai/v1/images/generations \
  -H "Authorization: Bearer $BETTERTOKEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2",
    "prompt": "Create a modern Chinese launch poster for an AI coding tool, with a clear headline, product UI, and clean background",
    "size": "1024x1024",
    "quality": "high"
  }' | jq -r '.data[0].b64_json' | base64 --decode > gpt-image-2.png
For the full parameter list, see the text-to-image documentation.

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Setup guidance

If you use your own application, script, or external tool, confirm that it supports the OpenAI-compatible image generation endpoint. Image generation uses https://www.bettertoken.ai/v1; do not use the Claude Code / Anthropic protocol endpoint. Copy the current model ID from the model plaza. Do not use ChatGPT UI mode names as API parameters.

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Notes

  • Image generation averages about 100 to 200 seconds. Set client, gateway, or external-tool request timeouts above 300 seconds, and show a waiting state in your application.
  • gpt-image-2 currently does not support transparent backgrounds. Generate a non-transparent image first, then remove the background with another image tool if needed.
  • Image results are returned as b64_json by default. Decode the base64 value before saving the image.
  • Large, high-quality images can increase latency and cost. Use quality: "low" for previews.
  • Review images with text, layout, and brand elements before publishing them.

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Official sources