What does World Labs' Marble API cost per world, which models exist, and what can you export?

World Labs docs (captured 2026-10-23): API credits cost $1.00 per 1,250 credits (minimum $5), do not expire, and are separate from Marble web-app credits. Per world: Marble 1.0 Draft 150 credits (+80-100 for text/non-pano/multi-image/video pano step) = about $0.12-0.20; Marble 1.0/1.1 1,500 credits (+0-100) = about $1.20-1.28; Marble 1.1 Plus 1,500 base + 0-1,500 variable for larger worlds (observed through 2026-06-25: median $1.28, mean $1.71, max ~$2.48); HQ mesh export 3,500 credits (~$2.80). Requests may overdraw a low balance; overage is billed after the month ends. Docs recommend Marble 1.1 to start, Plus for the largest worlds. Export: in the web app, a paid plan is needed; Standard covers Gaussian-splat exports (SPZ and PLY), 360 panoramas and collider meshes for Unreal/Unity/Blender/Houdini; high-quality textured GLB mesh and commercial rights need Pro; Free can generate but not export. Crosslink: creator reports find Marble crisp but movement-restricted with no working reflections (C3-B338-01). Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Observed-cost statistics (median/mean/max through 2026-06-25) are as stated on the docs page. Limitations: Web-app plan prices not captured; FAQ versions disagree on PLY via API (search snippets), not resolved here. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://docs.worldlabs.ai/api/pricing.md",
      "note": "Credits section; line 101; Observed Marble 1.1 Plus costs; NOTE"
    },
    {
      "url": "https://docs.worldlabs.ai/marble/export/gaussian-splat.md",
      "note": "Credits section; line 101; Observed Marble 1.1 Plus costs; NOTE"
    }
  ]
}