---
title: Alumnium v0.13 with a new planner, a filesystem cache and Llama 4
pubDate: 2025-09-10
description: Alumnium implements a new planner, a filesystem cache and upgrades Llama support to 4.
author:
  name: Alex Rodionov
  image: alex_rodionov.jpeg
tags: ["release notes"]
---

Alumnium [v0.13][1] is a big release focused on improving accuracy and stability. You can see the whole changelog on GitHub. Highlights include a new structured planner, a filesystem cache, and migration to Llama 4 with vision support.

## Structured Planner

This release introduces a structured planner that improves accuracy by requiring the LLM to return a JSON object containing both reasoning and an executable plan. The JSON includes an `explanation` field where the model must outline its step-by-step thinking before selecting an action. This enforced self-explanation reduces errors and produces more consistent outcomes. The planner is implemented across DeepSeek, MistralAI, Google, Llama, and OpenAI models.

## Filesystem Cache

A new filesystem-backed cache is now enabled by default to improve performance and eliminate error across parallel test runs. It supports safe concurrent access. To switch back to the previous implementation, set `ALUMNIUM_CACHE=sqlite`. To disable caching entirely, set `ALUMNIUM_CACHE=false`.

## Llama 4

This version migrates from Llama 3.2 to Llama 4 using the Maverick 17B model, delivering better performance, accuracy, and reasoning. Llama 4 also adds vision checks, allowing the model to retrieve data and perform validations using application screenshots.

## Coming Next

The structured planner paves the way to [integrating more advanced "thinking" models][1].

Work is also underway to extract core logic into [a standalone Alumnium Server][2], the first step toward multi-language client bindings, enabling test authoring in additional languages. Stay tuned!

[1]: https://github.com/alumnium-hq/alumnium/releases/tag/0.13.0
[2]: https://github.com/alumnium-hq/alumnium/issues/109
[3]: https://github.com/alumnium-hq/alumnium/issues/105
