Laguna S 2.1

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Agents / Skills

A powerful 118B agentic coding model with reasoning and a 1M-token context window.

byPoolside

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Description

Laguna S 2.1 is a Mixture-of-Experts (MoE) model optimized for long-horizon engineering tasks, featuring a 1M-token context window and a native 'thinking' mode. It is demonstrated performing complex autonomous work including building a rendering engine from an empty folder, optimizing its own agent harness for speed, and re-deriving 50-year-old mathematical proofs.

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: A significant frontier model release that demonstrates high-level agentic persistence and reasoning in software…
Attributed to: @poolsideai
Built with: Laguna S 2.1 Reve 2.1
Links: poolside.ai
View tweet
Tags: #coding #moe #reasoning #agent

Discovered: X
First posted: X · Jul 21, 2026
Listed: Added 51d 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

All projects

Agents / Skills

Laguna S 2.1

A powerful 118B agentic coding model with reasoning and a 1M-token context window.

byPoolside

Playable

Laguna S 2.1 media is blocked

Allow external media to connect to the provider and play this content.

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: A significant frontier model release that demonstrates high-level agentic persistence and reasoning in software…
Attributed to: @poolsideai
Built with: Laguna S 2.1 Reve 2.1
Links: poolside.ai
View tweet
Tags: #coding #moe #reasoning #agent

Discovered: X
First posted: X · Jul 21, 2026
Listed: Added 51d 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

Timeline

Laguna S 2.1

Description

Timeline