> For the complete documentation index, see [/llms.txt](/llms.txt).

# Solar Mini 4

> Source: /docs/models/solar-mini-4

Cost-efficient compact model for agentic use

[Compare](/docs/models/compare/generative-intelligence)

- **Intelligence**: 4 (Higher)
- **Speed**: 5 (Fast)
- **Price**: $0.10/1M tokens (Input Token)
- **Price**: $0.40/1M tokens (Output Token)
- **Price**: $0.01/1M tokens (Cached Token)

Solar Mini 4 is Upstage's cost-efficient, compact language model (35B total / 3B active parameters), built for agentic use cases where response speed and cost matter. It combines fluent Korean with strong English and Japanese capabilities and supports long-context workloads.

- 512K context length
- 35B / 3B active parameters
- Feb, 2026 training data cut-off
- Reasoning mode available

## Languages

- English: Input and output
- Korean: Input and output
- Japanese: Input and output

## Capabilities

- [Chat](/docs/capabilities/generate/chat): Supported
- [Structured outputs](/docs/capabilities/generate/structured-outputs): Supported
- [Tool calling](/docs/capabilities/generate/tool-calling): Supported
- [Reasoning](/docs/capabilities/generate/reasoning): Supported

## Max output tokens

128K

## Available Platforms

- Upstage Console
- [Playground](/playground/chat)
- [On-premises](https://www.upstage.ai/contact-us?utm_medium=console&utm_source=docs-models&utm_content=text-link)

## Versions

### solar-mini4-260922 (Alias: solar-mini4)

Released on 2026-09-22

Training data cut-off: Feb, 2026

Solar Mini 4 is Upstage's cost-efficient, compact model built for agentic use.

- 35B total parameters with 3B active
- 512K context length and up to 128K output tokens
- Fluent Korean alongside strong English and Japanese support
- Supports chat, reasoning, structured outputs, and tool calling
- Available platforms: Upstage Console, Playground, [On-premises](https://www.upstage.ai/contact-us?utm_medium=console&utm_source=docs-models&utm_content=text-link)

## API privacy

Data not collected

Upstage does not collect any data from this API

1. API input data is not used for model training.
2. API input data is not stored, unless required for service delivery and explicitly stated.

Free

Chat with Solar Mini 4 in the Playground!

✓ Chat with Solar Mini 4

✓ Configure & run in browser

✓ No API key needed - free to try

[Try it in the Playground](/playground/chat)

[Try the demo](https://solar-chat.upstage.ai)