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Upstage

solar-pro3 API

Upstage
About

Build advanced reasoning agents with solar-pro3, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.25/1M input and $0.25/1M output tokens, native tool calling support. Access solar-pro3 via the Upstage API with up to 8K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
131K

Tokens

Input Limit
131K

Tokens

Max Output
8K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.25
Output
$0.25
Frequently Asked Questions

solar-pro3 by Upstage costs $0.25 per 1M input tokens and $0.25 per 1M output tokens.

Model Details
ID
solar-pro3
Provider
Upstage
Family
solar-pro
Release Date
Jan 1, 2026
Knowledge Cutoff
Mar 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
UPSTAGE_API_KEY
API Base URL
https://api.upstage.ai/v1/solar
Documentation