Laguna S 2.1Poolside
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Solar Pro 4Upstage
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Related Products
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About
Laguna S 2.1 is an open weight agentic coding model designed to pursue longer-horizon work and make effective use of reasoning. It uses a 118-billion-parameter Mixture-of-Experts architecture with 8 billion active parameters per token and supports a context window of up to one million tokens in both thinking and no-thinking modes. Its compact active size makes it suitable for complex work on local machines while remaining competitive with models many times larger on terminal, software-engineering, codebase-question-answering, and tool-use benchmarks. Laguna S 2.1 is built to keep working through difficult tasks with greater persistence, verification, and willingness to backtrack instead of declaring success too early. In demonstrated runs, it built and validated a browser rendering engine from an empty folder, optimized an agent harness for faster execution and substantially lower memory allocation, and completed extended mathematical research using the tools in its environment.
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About
Solar Pro 4 is an agentic AI model built to carry real work to the finish: reading documents, running tools, producing deliverables, and stopping when the evidence runs out. It targets longer, more complex workloads that move across multiple documents, execute tasks in a terminal, and chain tool calls over many steps. The model supports a 512K context window with up to 128K output tokens, allowing agents to load contracts, reports, and data files into a single session without splitting them. It handles English, Korean, and Japanese for both input and output, while adjustable reasoning effort lets users choose deeper analysis or faster, real-time interaction. Solar Pro 4 is designed to stay accurate through long documents, multi-turn tool use, and terminal tasks, and to preserve values and conclusions across sequential deliverables such as Excel workbooks, reports, and slide decks.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Developers and engineering teams seeking an efficient reasoning model for long-horizon coding, software engineering, and agentic tasks
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Audience
Developers and organizations seeking to run complex AI agent workflows across documents, tools, terminals, and multi-step business tasks with verifiable outputs
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
No information available.
Free Version
Not Supported
Free Trial
Not Supported
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Pricing
$0.03 per 1M tokens
Free Version
Not Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Pros & Cons from Real UsersPros
Cons
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Training
Documentation
Supported
Webinars
Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Supported
Live Online
Supported
In Person
Not Supported
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Company InformationPoolside
Founded: 2023
United States
poolside.ai/blog/introducing-laguna-s-2-1
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Company InformationUpstage
Founded: 2020
United States
www.upstage.ai/blog/en/solar-pro-4
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Alternatives |
Alternatives |
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Categories |
Categories |
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Integrations
Hermes Agent
Supported
OpenRouter
Supported
Agent Client Protocol (ACP)
Supported
Claude Code
Supported
Cline
Supported
Hugging Face
Supported
IntelliJ IDEA
Supported
Kilo Code
Supported
Nous Portal
Supported
Ollama
Supported
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Integrations
Hermes Agent
Supported
OpenRouter
Supported
Agent Client Protocol (ACP)
Not Supported
Claude Code
Not Supported
Cline
Not Supported
Hugging Face
Not Supported
IntelliJ IDEA
Not Supported
Kilo Code
Not Supported
Nous Portal
Not Supported
Ollama
Not Supported
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