solar-pro2
Summary
solar-pro2 is a proprietary language model from Upstage, released on 20 May 2025. It accepts text and generates text, with a 66K-token context window and up to 8K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.25 per million input tokens and $0.25 per million output tokens (Upstage Console), across 1 provider we track.
Flagship model for demanding analysis, coding, and production agent workflows
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Upstage |
|---|---|
| Release date | 20 May 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 66K (65,536 tokens) [models.dev] |
| Max output | 8K tokens [models.dev] |
| Knowledge cutoff | Mar 2025 [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
solar-pro2 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Upstage Console solar-pro2 | $0.25 | $0.25 | – | 66K | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of solar-pro2?
solar-pro2 has a context window of 65,536 tokens (66K) and can generate up to 8,192 tokens in a single response, according to models.dev.
How much does the solar-pro2 API cost?
Through Upstage Console, solar-pro2 costs $0.25 per million input tokens and $0.25 per million output tokens. Prices last verified 4 Oct 2026.
Is solar-pro2 open source?
No. solar-pro2 is a proprietary model; Upstage has not released its weights. It is available through APIs including Upstage Console.
When was solar-pro2 released?
Upstage released solar-pro2 on 20 May 2025, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.