APIMART Growth evidence. GPT Image 1 facts were checked on 2026-09-02. CTA links are attributed to this exact GitHub guide.

GPT Image 1 API Limits: Resolution, Inputs and Request Boundaries

APIMART serves GPT Image 1 through POST /v1/images/generations. The current documentation describes an asynchronous submit-and-poll workflow. The boundaries below were checked on September 2, 2026.

Verified boundaries

• The exact model ID is gpt-image-1-official; the endpoint also supports gpt-image-1.5-official as a distinct option.
• The route supports text-to-image, image-to-image and inpainting with a mask URL.
• A request can generate 1 to 4 images and accepts up to 15 publicly reachable reference-image URLs.
• Supported aspect ratios are 1:1, 3:2 and 2:3, mapped to documented official dimensions.
• Quality supports auto, low, medium and high; background supports auto, opaque and transparent.
• Transparent background cannot be combined with JPEG output; generation is asynchronous and failed generations are not billed.

Minimal integration rule

Send the documented model ID, required prompt and only compatible optional inputs. Persist the returned task_id, implement bounded polling and backoff, and keep 400, 401, 402, 429 and 5xx responses out of completed-output metrics.

FAQ

Which endpoint serves GPT Image 1?

Use POST /v1/images/generations with the documented model ID and Bearer authentication.

Is processing synchronous?

No. A successful submission returns a task ID that must be polled for completion.

What is the first production safeguard?

Validate model ID, quantity or duration, resolution and input combinations before submission.

Can documented limits change?

Yes. Treat the live endpoint documentation as the source of truth and version your request profile.

Should a submitted task be counted as completed output?

No. Count success only after the task endpoint reports a completed result.

Try GPT Image 1 on APIMART

Open the attributed model page or review current APIMART pricing.

Sources and disclosure

Technical source: APIMART endpoint documentation, checked September 2, 2026. APIMART operates the gateway; limits may change.

APIMART links for this guide

• Open GPT Image 1 on APIMART
• Review current APIMART pricing

Machine-readable schema source

The eventual APIMART CMS page should emit these JSON-LD objects.

[
  {
    "@context": "https://schema.org",
    "@type": "Article",
    "headline": "GPT Image 1 API Limits: Resolution, Inputs and Request Boundaries",
    "mainEntityOfPage": "https://apimart.ai/blog/gpt-image-1-api-limits-resolution-inputs",
    "dateModified": "2026-09-02",
    "author": {
      "@type": "Organization",
      "name": "APIMART"
    }
  },
  {
    "@context": "https://schema.org",
    "@type": "FAQPage",
    "mainEntity": [
      {
        "@type": "Question",
        "name": "Which endpoint serves GPT Image 1?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "Use `POST /v1/images/generations` with the documented model ID and Bearer authentication."
        }
      },
      {
        "@type": "Question",
        "name": "Is processing synchronous?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "No. A successful submission returns a task ID that must be polled for completion."
        }
      },
      {
        "@type": "Question",
        "name": "What is the first production safeguard?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "Validate model ID, quantity or duration, resolution and input combinations before submission."
        }
      },
      {
        "@type": "Question",
        "name": "Can documented limits change?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "Yes. Treat the live endpoint documentation as the source of truth and version your request profile."
        }
      },
      {
        "@type": "Question",
        "name": "Should a submitted task be counted as completed output?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "No. Count success only after the task endpoint reports a completed result."
        }
      }
    ]
  }
]