# Laguna S 2.1

poolside, released 2026-07-21

**Verdict: conditional.** Laguna S 2.1 is the first credible Western open-weight coding model in 11 months — a 118B MoE that activates only 8B parameters per token yet scores 70.2% on Terminal-Bench 2.1, beating models 10x its size. But it's not at the frontier — GPT-5.6 Sol and Kimi K3 sit far ahead — and known limitations include harness overfitting, JSON mangling in nested tool arguments, and no configurable thinking-effort control. Poolside's collapsed $14B Series C raises sustainability questions, making this best for self-hosted agentic coding where data sovereignty matters more than absolute benchmark leadership. Last verified 2026-07-22.

## Pricing

- Input: $0.10 / 1M
- Output: $0.20 / 1M
- Context: OpenMDW-1.1 license, 1M context

Canonical: https://neomanex.com/models/laguna-s-2-1