Poolside: Laguna S 2.1

poolside/laguna-s-2.1

Laguna S 2.1 is the latest coding agent model from [Poolside](<https://poolside.ai/>). Laguna S 2.1 is a 118B total parameter model with 8B active parameters, scoring 70.2% on Terminal-Bench 2.1 and...

Modalities

In / out price

$0.090 / $0.18 per 1M

Context

1.05M

Released

Jul 21, 2026

Why use Laguna S 2.1

Step-by-step reasoning mode
Tool and function calling (agent-ready)
Very long context: whole books or codebases in one prompt

Pricing

Input	$0.090 / 1M tokens
Output	$0.18 / 1M tokens
Cached input (read)	$0.009 / 1M tokens

List prices via OpenRouter, checked daily. Real cost depends on the provider and on reasoning tokens.

Cost calculator

Pick a task, set how often you run it, and compare what it costs on each model.

TaskInput tokens≈ 602 wordsOutput tokens≈ 1,504 wordsRuns per month

Input served from cache: 0%Repeated prompts (same instructions or document) are billed at the cheaper cache-read price where the model supports it.

Model	Per run	Per month	Per 1,000 runs
Poolside: Laguna S 2.1	$0.0004	$0.432	$0.432

Estimates from list prices via OpenRouter; real bills vary by provider and reasoning tokens.

Will it fit? Context window simulator

Each square is about one page (500 words). Colored squares are your content; grey squares are free space in the model's context window.

Your content

Novel (90,000 words)

Total: about 120,000 tokens (≈ 90,226 words). Token counts are estimates.

Models

Zoom (square size): 6pxZoom out to see a whole million-token window at once.