# 3D world models for AI agents

> 2 3d worlds ranked by the Anchor benchmark. Leader SpAItial API (Echo) (C). World models behind an API that turn a phone capture, photos, video or a prompt into a 3D scene (Gaussian splats, point clouds or meshes). Compared on price per world, how long a job takes, which inputs and output formats come back, real-world scale, and what you may do with the result.

- Canonical: https://www.anchorterminal.com/categories/3d-worlds
- Markdown: https://www.anchorterminal.com/categories/3d-worlds.md (~1,100 tokens)
- Slim: https://www.anchorterminal.com/categories/3d-worlds.min.md (~280 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/categories/3d-worlds.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

World models behind an API that turn a phone capture, photos, video or a prompt into a 3D scene (Gaussian splats, point clouds or meshes). Compared on price per world, how long a job takes, which inputs and output formats come back, real-world scale, and what you may do with the result.

- Tools ranked: 2 · agent-ready (BB or better): 0 · accept x402: 0 · hosted endpoints: 2 · desk reviews by the panel: 0
- JSON: https://www.anchorterminal.com/api/v1/tools.json (list) · https://www.anchorterminal.com/api/v1/rankings.json (ranked) · https://www.anchorterminal.com/api/v1/x402.json (payable) · https://www.anchorterminal.com/api/v1/capabilities.json (by capability)
- Grades run AA, A, BB, B, C, D, E, F · methodology: https://www.anchorterminal.com/benchmark/

- Head-to-head comparisons (1): https://www.anchorterminal.com/compare/3d-worlds/index.md
- Capabilities in this category: 3d.world-generate, 3d.reconstruct, 3d.export
- https://letme.dev/3d.world-generate picks the top-graded tool in this list and says how to call it direct (https://www.anchorterminal.com/letme/index.md)

## Ranking

| # | Tool | Vendor | Kind | Category | Grade | Score | Confidence | x402 | Auth | Where | Reviews | Page |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 731 | SpAItial API (Echo) | SpAItial | HTTP API | 3D worlds | C | 56.7 | medium | no | API key | hosted | none | https://www.anchorterminal.com/tools/spaitial.md |
| 930 | World Labs World API (Marble) | World Labs Technologies, Inc. | HTTP API | 3D worlds | D | 50.1 | medium | no | API key | hosted | none | https://www.anchorterminal.com/tools/world-labs.md |

Scores are from public evidence against the published checklist (https://www.anchorterminal.com/benchmark/), with Performance and Task success pending. p95 latency and context cost come from our probes, which haven't run yet.

## Summaries

### 731. SpAItial API (Echo), C (56.7)

SpAItial's developer API and hosted MCP server for its Echo world models, which turn a text prompt, image or 360-degree panorama into an explorable 3D Gaussian-splat world with mesh and floor-plan exports. Echo-3 capture reconstruction is enterprise-only. Self-serve keys, 800 free credits a month (about five Echo-2 worlds), a public OpenAPI file, idempotency keys and signed webhooks make the async world flow easy to automate. Echo-3, released on 27 October, isn't on the self-serve API, commercial use needs the $99.99 Pro plan, and inputs and outputs may be used for training.

- Page: https://www.anchorterminal.com/tools/spaitial · Markdown: https://www.anchorterminal.com/tools/spaitial.md · JSON: https://www.anchorterminal.com/api/v1/tools/spaitial.json
- Capabilities: 3d.world-generate, 3d.export · endpoint: `https://api.spaitial.ai/v1`

### 930. World Labs World API (Marble), D (50.1)

World Labs' World API generates explorable 3D worlds (Gaussian splats, a collider mesh and a panorama) from text, images, panoramas or video with its Marble models, as asynchronous jobs at api.worldlabs.ai paid for with prepaid credits. An OpenAPI 3.1 file, llms.txt and per-event credit prices make the World API straightforward to call, and a Marble 1.1 world from text costs $1.264. There is no free API tier, status page or webhook, inputs may train World Labs' models unless the user opts out, and AMD agreed in September 2026 to buy the company.

- Page: https://www.anchorterminal.com/tools/world-labs · Markdown: https://www.anchorterminal.com/tools/world-labs.md · JSON: https://www.anchorterminal.com/api/v1/tools/world-labs.json
- Capabilities: 3d.world-generate, 3d.reconstruct, 3d.export · endpoint: `https://api.worldlabs.ai/marble/v1`


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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp