Laguna S 2.1

A 118B parameter MoE coding model with long-horizon reasoning and 1M context.

Playable

Description

A Mixture-of-Experts (MoE) model optimized for agentic coding and long-horizon tasks, supporting a context window of up to 1M tokens. It features a dedicated 'thinking mode' that significantly boosts performance on complex software engineering benchmarks like DeepSWE and Terminal-Bench.

Descriptions, tags, and model credits may be AI-generated or inferred from public sources and can be incomplete or wrong. Learn more.

Details

Why this is interesting: It achieves frontier-level agentic coding performance at a 118B size, rivaling 1T+ parameter models on SWE-Bench.
Attributed to: @poolsideai
Built with: Laguna S 2.1
Links: poolside.ai
View tweet
Tags: #coding #agent #moe #open-weights

Discovered: X
First posted: X · Jul 21, 2026
Listed: Added 83d ago
Build: Strong
Models: Strong

Prompts

Prompt 1

your job is it to build a simple browser engine (just html/css) in javascript to demonstrate the capabilities of poolsides new "Laguna S" model. the goal is to take render html snippets in a canvas like a real browser. to demonstrate it the engine, build a self-contained single page app that showcases a gallery of multiple html snippets and renders them side by side (canvas with our render engine + iframe letting the hosting browser render it for real for comparison). support for most common layout and styling elements

Source

Prompt 2

Hi! Can you make a fun, pool-themed variant of Tetris in game.html? It really should be pool-themed, since Poolside made you! And lots of sparks (I mean lots of sparks) since you're running on a DGX Spark!

Source

Explore

Agents / Skills

Laguna S 2.1

A 118B parameter MoE coding model with long-horizon reasoning and 1M context.

byPoolside

Playable

Description

Descriptions, tags, and model credits may be AI-generated or inferred from public sources and can be incomplete or wrong. Learn more.

Details

Why this is interesting: It achieves frontier-level agentic coding performance at a 118B size, rivaling 1T+ parameter models on SWE-Bench.
Attributed to: @poolsideai
Built with: Laguna S 2.1
Links: poolside.ai
View tweet
Tags: #coding #agent #moe #open-weights

Discovered: X
First posted: X · Jul 21, 2026
Listed: Added 83d ago
Build: Strong
Models: Strong

Prompts

Prompt 1

your job is it to build a simple browser engine (just html/css) in javascript to demonstrate the capabilities of poolsides new "Laguna S" model. the goal is to take render html snippets in a canvas like a real browser. to demonstrate it the engine, build a self-contained single page app that showcases a gallery of multiple html snippets and renders them side by side (canvas with our render engine + iframe letting the hosting browser render it for real for comparison). support for most common layout and styling elements

Source

Prompt 2

Hi! Can you make a fun, pool-themed variant of Tetris in game.html? It really should be pool-themed, since Poolside made you! And lots of sparks (I mean lots of sparks) since you're running on a DGX Spark!

Source

Laguna S 2.1

Description

How it grew

Laguna S 2.1

Description

How it grew