Laguna XS 2.1 (free)

Laguna XS 2.1 is a coding-focused agent model from Poolside, positioned as an evolution of the Laguna XS.2 released in April 2026. It belongs to the 33B-A3B model category, a Mixture-of-Experts configuration that activates a smaller subset of parameters per token, balancing computational efficiency with coding capability. This design suggests an emphasis on practical developer workflows where inference cost and responsiveness matter as much as raw reasoning depth.

The model is aimed at software engineering tasks, particularly coding agent scenarios where large context retention is valuable. Its 262,144-token context window allows it to process substantial codebases or extended sessions without losing earlier context, and its 32,768-token maximum output supports multi-step generations such as function implementations, refactors, or agentic tool-driven sequences. As a free-tier offering routed via aggregator infrastructure, it provides accessible entry to Poolside's coding agent lineage for experimentation, prototyping, and integration testing without per-token cost.