Poolside

Laguna XS 2.1

poolside/laguna-xs-2.1
Model weightsReleased Jul 2, 2026Open Weights
ThinkingToolsopen weights

Laguna XS 2.1 is the latest coding agent model in the 33B-A3B category from Poolside and a step forward from their Laguna XS.2 model (released in April 2026). It combines...

Cost / 1M tokens

Very low usage

$0.06

input

$0.03

cached input

$0.12

output

Context Window

262K

Up to 33K max output

Modalities

text → text

Other tokenizer

Quickstart & API

poolside/laguna-xs-2.1
Open the model picker in ChatOSS Desktop (Code, Kanban, or Chat) and select or paste this model ID.

Best for & Strengths

Key Strengths

Open weightsExtended reasoningTool & agent callingLong context window

Recommended Workloads in ChatOSS

  • Coding agents
  • Complex reasoning & debugging
  • Open-source AI workflows
Available in ChatOSS Code, Kanban Orchestrate, and Chat modes via Plus, Max, or BYOK.

Active Provider Endpoints (1)

Upstream inference providers serving Laguna XS 2.1, with per-provider pricing, context limits, quantization, and 24-hour uptime.

ProviderInput / 1MOutput / 1MCache Read / 1MContextMax OutputQuantizationUptime (24h)
Poolsidecache
poolside/fp8
$0.06$0.12$0.03262K33Kfp8100.0%

Supported API Parameters

Parameters accepted by this model when called through ChatOSS or OpenRouter.

include_reasoningmax_tokensreasoningtemperaturetool_choicetools

Compare Similar Models

Browse all models →

Poolside

Laguna S 2.1

1M

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...

$0.09 / $0.18

Anthropic

Claude Opus 5.5

1M

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

$4.00 / $20.00Coding 74.1%

Moonshot AI

Kimi K3.1 Pro

1M

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...

$2.00 / $10.00Coding 65%

Anthropic

Claude Opus 5

1M

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...

$5.00 / $25.00Coding 68.3%

Anthropic

Claude Fable 5.1

1M

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

$10.00 / $50.00Coding 67.6%

Z.ai (GLM)

GLM 5.3

1M

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...

$0.07 / $1.40Coding 58.3%