Solar Pro 4

Solar Pro 4

Upstage
Syn

Syn

Upstage AI
+
+

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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.

About

Syn is a next‑generation Japanese large language model co‑developed by Upstage and Karakuri, featuring under 14 billion parameters and optimized for enterprise use in finance, manufacturing, legal, and healthcare. It delivers top‑tier benchmark performance on the Weights & Biases Nejumi Leaderboard, achieving industry‑leading scores for accuracy and alignment, while maintaining cost efficiency through a lightweight architecture derived from Solar Mini. Syn excels in Japanese “truthfulness” and safety, understanding nuanced expressions and industry‑specific terminology, and offers flexible fine‑tuning to integrate proprietary data and domain knowledge. Built for scalable deployment, it supports on‑premises, AWS Marketplace, and cloud environments, with security and compliance safeguards tailored to enterprise requirements. Leveraging AWS Trainium, Syn reduces training costs by approximately 50 percent compared to traditional GPU setups, enabling rapid customization of use cases.

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

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

Audience

Developers and organizations seeking to run complex AI agent workflows across documents, tools, terminals, and multi-step business tasks with verifiable outputs

Audience

Companies seeking a tool tailored for enterprise‑grade applications and seamless integration with industry‑specific workflows

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$0.03 per 1M tokens
Free Version Not Supported
Free Trial Not Supported

Pricing

$0.1 per 1M tokens
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Supported
Live Online Supported
In Person Not Supported

Training

Documentation Supported
Webinars Supported
Live Online Supported
In Person Supported

Company Information

Upstage
Founded: 2020
United States
www.upstage.ai/blog/en/solar-pro-4

Company Information

Upstage AI
Founded: 2020
United States
www.upstage.ai/news/introducing-upstage-japan

Alternatives

Solar Pro 2

Solar Pro 2

Upstage AI

Alternatives

Solar Mini

Solar Mini

Upstage AI
Solar Mini

Solar Mini

Upstage AI
Solar Pro 2

Solar Pro 2

Upstage AI
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Seed2.1 Turbo

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Ultramarine 1 Flash

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Phi-4-reasoning

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Pokee-Isaac

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Xgen-small

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Categories

AI Models Supported

Categories

AI Models Supported

Integrations

Upstage AI Supported
AWS Marketplace Not Supported
AWS Trainium Not Supported
Amazon Web Services (AWS) Not Supported
Hermes Agent Supported
OpenAI Supported
OpenRouter Supported
Solar Mini Not Supported

Integrations

Upstage AI Supported
AWS Marketplace Supported
AWS Trainium Supported
Amazon Web Services (AWS) Supported
Hermes Agent Not Supported
OpenAI Not Supported
OpenRouter Not Supported
Solar Mini Supported
Claim Solar Pro 4 and update features and information
Claim Solar Pro 4 and update features and information
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Claim Syn and update features and information