# Brimload

> Cuberithm Inc. makes Brimload for container loading, and RotoSpider and RotoScheduler for rotational molding. Sean Wu founded Zhihuo in Beijing in 2003 and Cuberithm in Winnipeg in 2026. Business model: customized development and company-wide licensing. The free trial/download versions are deliberately simplified baselines for per-client customization, and a production version can be significantly more sophisticated than the trial.

## Container Loading (Brimload, formerly SmartPacker)

- [T1 - Single-SKU loading](https://brimload.com/t1/): one carton size loaded into a container, pallet area, leftover space, or a larger box. Free browser app plus desktop apps for Windows, Mac and Linux.
- T1 WebAPI: `POST https://mcp.cuberithm.com/api/t1/pack` accepts one carton size plus a container preset or explicit space dimensions and returns the count, fill rate, placed regions, and a 3D image URL. OpenAPI: `https://mcp.cuberithm.com/api/t1/openapi.json`. The same as an MCP server: `https://mcp.cuberithm.com/mcp`. Free, no API key; `depth` 2 (standard search) by default, 3 (Deeper search, stopped at 20 s) on request.
- [T1 for developers](https://brimload.com/t1/developers/): the MCP server, the WebAPI, the local CLI and the benchmark summary.
- [T1 benchmark report](https://brimload.com/t1/benchmark/): reproducible 10,000-case single-SKU 40HQ benchmark, first published June 2026, updated October 16, 2026. Every T1 loading plan (standard and Deeper search) is published with an independent layout checker; all 10,000 Deeper-search plans pass, every carton fully supported, and beat a six-orientation one-cut baseline on 7,816 cases, tied 2,181, fell short on 3 (by 1-2 cartons, where the baseline overhangs), +2.512% cartons on average. Standard-search plans failed the checker in 508 cases on October 16 (a carton not fully supported); corrected on October 17 in the web app and the MCP service, in the desktop app from 0.3.1 (Windows) and 0.3.2 (Mac, Linux), and in the local CLI download from October 19; all 10,000 now pass with the same counts. Also: a 91-case head-to-head with DimPack3D's free planner (T1 more cartons in 84, equal in 7, +10.4% on average), dated public-tool spot checks, CSV, summary JSON, generator ZIP, and local CLI.
- [T3 - Mixed-carton loading](https://brimload.com/t3/): multiple carton sizes, all six orientations, quantity lights and packing recipes, and the load arranged by hand in 3D with Undo; opens T3 Classic's master data and shipments. Windows trial.
- [T3 Classic](https://brimload.com/t3/classic/): the earlier Brimload T3, kept with its manual, videos and ZIP download for those who still use it. Windows trial.
- [U3 - Upright palletized loading](https://brimload.com/u3/): mixed palletized or upright-only cargo, standard and non-standard pallets. Windows trial.

## Company

- [About Brimload](https://brimload.com/about/): customized development and company-wide licensing.
- [Contact](https://brimload.com/contact/): sean.wu@cuberithm.com; [Book a 15-min call](https://brimload.com/book15)