- Context
- 131Ktokens
- Released
- 9mo ago
Upstage's Solar Pro 3 is a language model that succeeds Solar Pro 2, extending that predecessor's focus on efficient, stable enterprise deployment. Its launch announcement centers on better reasoning and instruction-following quality without raising serving costs, with Upstage claiming a 30% improvement in complex reasoning. The model is built for enterprise production services, aimed at multi-step reasoning workflows and accurate interpretation of user intent in Korean and English.
- Language model
- Reasoning
- Tools
How it compares
Additional source evidence
- Source model
- upstage/solar-pro3
- Source family
- solar-pro
- Last updated
- 2026-03-23
- Knowledge cutoff
- 2025-07
- Model context
- 131K
- Model output limit
- 8K
- Open weights
- No
- File attachments
- No
- Reasoning
- Yes
- Tool calling
- Yes
- Temperature control
- Yes
Complete source record (JSON)
{
"id": "upstage/solar-pro3",
"name": "Solar Pro 3",
"description": "Flagship model for demanding analysis, coding, and production agent workflows",
"family": "solar-pro",
"last_updated": "2026-03-23",
"knowledge": "2025-07",
"attachment": false,
"reasoning": true,
"tool_call": true,
"temperature": true,
"modalities": {
"input": [
"text"
],
"output": [
"text"
]
},
"limit": {
"context": 131072,
"output": 8192
},
"release_date": "2026-01-26",
"open_weights": false
}Frequently asked questions
Capabilities and specs
Solar Pro 3 has a context window of 131K tokens (131,072), and its maximum output is 8K tokens (8,192).
No, Solar Pro 3 only accepts text input. It cannot read images, audio, video or PDFs.
Yes, Solar Pro 3 supports tool calling, also called function calling.
Yes, Solar Pro 3 has a reasoning mode and it is supported.
The knowledge cutoff of Solar Pro 3 is 2025-07.
Quality and benchmarks
Closest alternatives, matched on model kind and release date with no comparable price, are ERNIE 5.0 by Baidu, GPT-5.3 Codex Spark by OpenAI and Composer 1.5 by Cursor.
ERNIE 5.0Solar Pro 3 vs ERNIE 5.0GPT-5.3 Codex SparkSolar Pro 3 vs GPT-5.3 Codex SparkComposer 1.5Solar Pro 3 vs Composer 1.5
Kimi K3. It is the highest-ranked open-weight model on Arena Text at rank 19, while Solar Pro 3 itself is closed.
Licensing and access
No, Solar Pro 3 is closed. It is neither open source nor open weights.
Basics
Solar Pro 3 was made by Upstage and released on January 26, 2026.
Generated from Vertical Tabs data, updated November 10, 2026.
Discussion
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