> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apiyi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Veo 3.

> Veo 3.1 video model may return "internal service error" due to Google Flow tightening captcha verification, causing occasional task failures…

**2026/3/5 11:50 (UTC+8)** · Model Status · Google

Veo 3.1 video model may return "internal service error" due to Google Flow tightening captcha verification, causing occasional task failures — please retry. Supply remains sufficient; Veo 3.1 is a solid alternative while Sora 2 is unavailable.

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