APIMART Growth evidence. GPT Image 2 facts were checked on 2026-09-02. CTA links are attributed to this exact GitHub guide.

GPT Image 2 API Limits: Resolution, Inputs and Request Boundaries

APIMART serves GPT Image 2 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 documented GPT Image 2 route accepts 1K, 2K and 4K output resolutions.
• The current documentation lists 15 supported aspect ratios for generation.
• Image editing accepts up to 16 reference images and supports URL or base64 input.
• The external route fixes n to 1, so multiple outputs require separate completed tasks.
• Submission is asynchronous and returns task_id for status polling.
• Count and bill only completed image results; a submitted task is not a finished output.

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 2?

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 2 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 2 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 2 API Limits: Resolution, Inputs and Request Boundaries",
    "mainEntityOfPage": "https://apimart.ai/blog/gpt-image-2-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 2?",
        "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."
        }
      }
    ]
  }
]