Poolside releases open-weight coding model Laguna S 2.1

Poolside released Laguna S 2.1, a 118-billion-parameter open-weight mixture-of-experts coding model with 8 billion active parameters per token and a 1-million-token context window. The model matches or beats several times larger models on agentic coding benchmarks including SWE-Bench Multilingual, and it runs on a single Nvidia DGX Spark. It ships under the OpenMDW-1.1 open license.

Why it matters: Efficient MoE coding models that run on a single workstation-class box continue to narrow the gap between frontier-lab coding assistants and self-hosted alternatives, following a wave of open coding releases from Alibaba's Qwen and Moonshot's Kimi. For teams wary of sending code to a third-party API, a strong open-weight model with a 1M-token context is a meaningful alternative to closed agentic coding tools.