Solar Mini 4
Solar Mini 4 is a compact, cost-efficient language model developed by Upstage. It features a 524K context window and is specifically engineered to handle agentic tasks that require reasoning and tool calling.
Solar Mini 4 specs and pricing
- Provider: Upstage
- Released: September 23, 2026
- Context window: 524K tokens
- Max output: 131K tokens
- Input: text
- Output: text
- Price: $0.05 input / $0.20 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What Solar Mini 4 is good at
- Complex reasoning tasks
- Automated agent workflows
- Processing large volumes of text
To-dos to try with Solar Mini 4
- Analyze a 400-page document to extract and summarize key contractual obligations.
- Use tool calling to search a database and generate a report based on the retrieved data.
- Execute a multi-step reasoning task to solve a complex logical problem.
FAQ
- What is the primary purpose of Solar Mini 4? It is designed as a cost-efficient model for agentic use cases that require reasoning and the ability to use external tools.
- Does Solar Mini 4 support image processing? No, the model is designed to process and output text only.
- How much does Solar Mini 4 cost? Solar Mini 4 costs $0.05 per million input tokens and $0.20 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 0.17 credits ($1 = 100 credits).
- What is the context window of Solar Mini 4? Solar Mini 4 can read up to 524K tokens at once and write up to 131K tokens in one reply.
- Can I use Solar Mini 4 without coding? Yes. In todo.is you pick Solar Mini 4 as your agent's model and write to-dos in plain words, on the web, the Android app, WhatsApp or Telegram. No API key needed: credits are included, or you can bring your own key.
JavaScript is required to use the todo.is app.