Solar Pro 3
Solar Pro 3 is a Mixture-of-Experts language model developed by Upstage. It is designed for efficient text-based processing and supports complex reasoning and tool-calling tasks.
Solar Pro 3 specs and pricing
- Provider: Upstage
- Released: January 27, 2026
- Context window: 131K tokens
- Max output: 118K tokens
- Input: text
- Output: text
- Price: $0.15 input / $0.60 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What Solar Pro 3 is good at
- Complex reasoning tasks
- Applications requiring tool-calling functionality
- Large-scale text analysis
To-dos to try with Solar Pro 3
- Analyze a complex technical document and extract key logical arguments.
- Use tool-calling to retrieve data from an external database based on a natural language query.
- Draft a multi-step project plan that requires logical sequencing of tasks.
FAQ
- Who developed Solar Pro 3? Solar Pro 3 is developed by Upstage.
- What kind of data can this model process? This model is designed to process and generate text-based input and output.
- How much does Solar Pro 3 cost? Solar Pro 3 costs $0.15 per million input tokens and $0.60 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 0.5 credits ($1 = 100 credits).
- What is the context window of Solar Pro 3? Solar Pro 3 can read up to 131K tokens at once and write up to 118K tokens in one reply.
- Can I use Solar Pro 3 without coding? Yes. In todo.is you pick Solar Pro 3 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.