{"id":5966,"date":"2026-03-27T17:27:49","date_gmt":"2026-03-27T09:27:49","guid":{"rendered":"https:\/\/crepal.ai\/blog\/?p=5966"},"modified":"2026-03-27T17:27:51","modified_gmt":"2026-03-27T09:27:51","slug":"ltx-2-3-api-pricing-guide","status":"publish","type":"post","link":"https:\/\/crepal.ai\/blog\/aivideo\/ltx-2-3-api-pricing-guide\/","title":{"rendered":"LTX 2.3 API Pricing: Fast vs Pro, 720p vs 1080p Explained"},"content":{"rendered":"\n

How you guys doing? This is Dora again! Last week I was budgeting a batch of product videos \u2014 30 clips, five seconds each. I opened the LTX 2.3 pricing page<\/a>, stared at it for three minutes, and realized I genuinely didn’t know whether to use Fast or Pro, 1080p or 1440p, or whether fal.ai and ltx.io were charging the same rates. The page lists numbers. It does not tell you what those numbers mean<\/em> in practice.<\/p>\n\n\n\n

So I did the math for both of us.<\/p>\n\n\n\n

This article breaks down every LTX 2.3 API pricing tier, explains the actual quality difference between Fast and Pro, and gives you a real cost estimator so you know exactly what you’ll spend before you generate a single frame.<\/p>\n\n\n\n

How LTX 2.3 API Pricing Works (Per-Second Billing Explained)<\/h2>\n\n\n\n

LTX 2.3 uses straightforward per-second billing \u2014 you pay for the duration of the video you generate, not for compute time or queue time. No subscriptions, no seat fees, no minimums.<\/p>\n\n\n\n

The model is pay-per-second with no minimums, covering text-to-video, image-to-video, audio-to-video, extend, and retake endpoints.<\/p>\n\n\n\n

The billing unit is seconds of output video<\/strong>, with the rate determined by three variables:<\/p>\n\n\n\n

    \n
  1. Model variant<\/strong> \u2014 Fast or Pro<\/li>\n\n\n\n
  2. Resolution<\/strong> \u2014 1080p, 1440p, or 2160p (4K)<\/li>\n\n\n\n
  3. Endpoint type<\/strong> \u2014 text-to-video, image-to-video, audio-to-video, retake, or extend<\/li>\n<\/ol>\n\n\n\n

    One thing that trips people up: portrait and landscape formats are priced identically at the same resolution tier. Portrait and landscape generations are priced identically at the same resolution tier, so switching your 16:9 clips to 9:16 for Reels won’t cost you more.<\/p>\n\n\n\n

    \n
    \"\"<\/figure>\n<\/figure>\n\n\n\n

    Fast vs Pro Variants: What’s Different in Quality and Speed<\/h2>\n\n\n\n

    This is the question I get asked most. Here’s the honest answer.<\/p>\n\n\n\n

    ltx-2.3-fast<\/strong> is optimized for speed and cost efficiency, making it suitable for high-volume or iterative generation. ltx-2.3-pro<\/strong> is optimized for higher visual quality and advanced use cases, with higher per-second pricing.<\/p>\n\n\n\n

    In practice, the difference matters a lot for certain content types and barely at all for others:<\/p>\n\n\n\n

    Use Fast when:<\/strong><\/p>\n\n\n\n