ChatGPT Web returns one image per chat turn; requested n=${r

Error message

ChatGPT Web returns one image per chat turn; requested n=${requestedCount} will run sequentially

What it means

Error "ChatGPT Web returns one image per chat turn; requested n=${requestedCount} will run sequentially" thrown in diegosouzapw/OmniRoute.

Source

Thrown at open-sse/handlers/imageGeneration/providers/chatgptWeb.ts:88

  }

  // Each image is one chatgpt.com chat turn (~30s). Cap at 4 (matches OpenAI's
  // own limit for GPT Image models) so a stray n=1000 doesn't pin the
  // executor for hours before the upstream HTTP timeout fires.
  const CHATGPT_WEB_IMAGE_N_MAX = 4;
  const rawCount = Number.isInteger(body.n) && (body.n as number) > 0 ? (body.n as number) : 1;
  if (rawCount > CHATGPT_WEB_IMAGE_N_MAX) {
    return saveImageErrorResult({
      provider,
      model,
      status: 400,
      startTime,
      error: `ChatGPT Web image generation supports n=1..${CHATGPT_WEB_IMAGE_N_MAX} (got ${rawCount}); each n is a separate ~30s chat turn.`,
    });
  }
  const requestedCount = rawCount;
  if (log && requestedCount > 1) {
    log.warn(
      "IMAGE",
      `ChatGPT Web returns one image per chat turn; requested n=${requestedCount} will run sequentially`
    );
  }

  const wantsBase64 = body.response_format === "b64_json";
  const images: Array<{ url?: string; b64_json?: string }> = [];
  const requestBody = {
    model,
    prompt: prompt.slice(0, 500),
    size: body.size || undefined,
    quality: body.quality || undefined,
  };

  for (let i = 0; i < requestedCount; i++) {
    const executor = executorFactory();
    const result = await executor.execute({
      model,

View on GitHub (pinned to a179ffed5b)

When it happens

Trigger: Thrown at open-sse/handlers/imageGeneration/providers/chatgptWeb.ts:88 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of diegosouzapw/OmniRoute@a179ffed5b (2026-08-25). Data as JSON: /api/errors/8d5b5a2b19f960f7. Report an issue: GitHub.