Solar Pro 2 — API Pricing & Benchmarks
Solar Pro 2 is Upstage's previous-generation reasoning model, released in 2025-05. The API costs $0.15 per 1M input tokens and $0.60 per 1M output tokens ($0.26 blended at a 3:1 ratio), with cached input at $0.01. On the independently measured Artificial Analysis Intelligence Index it scores 12.5, ranking #63 of 68 models tracked on this site.
Explore provider routes and additional benchmark sources for Solar Pro 2
| Provider | Upstage |
| Input price / 1M tokens | $0.15 |
| Output price / 1M tokens | $0.60 |
| Cached input / 1M tokens | $0.01 |
| Blended price (3:1) | $0.26 |
| Context window | — |
| Max output tokens | — |
| Knowledge cutoff | 2025-03 |
| License | proprietary |
| Input modalities | T |
| Output speed (tok/s) | — |
| Released | 2025-05 |
| Artificial Analysis Intelligence Index | 12.5 |
| GPQA Diamond | 57.8% |
| Humanity's Last Exam | 6.1% |
Where Solar Pro 2 fits
On a blended 3:1 basis Solar Pro 2 costs $0.26 per 1M tokens, cheaper than 89% of the 80 priced models in this index. It is a previous-generation model: usually only worth choosing if you have an existing integration, negotiated pricing, or need its specific behavior, since newer siblings offer better price-performance. Cached input is priced at $0.01 (90% below standard input), which rewards prompt structures with long stable prefixes — see our caching guide.
Price history
| Period | Input $/1M | Output $/1M | Cached $/1M |
|---|---|---|---|
| 2026-07-18 → current | $0.15 | $0.60 | $0.01 |
No list-price changes recorded since tracking began. Full dataset: price-history.json (CC BY 4.0).
Alternatives at a similar price
- GPT-4o mini (OpenAI) — $0.26/1M blended, AA Index 6.7
- Mistral Small 4 (Mistral AI) — $0.26/1M blended, AA Index 19.7
- Solar Pro 3 (Upstage) — $0.26/1M blended, AA Index 14.5
- GLM-5.3-Flash (Zhipu AI (Z.ai)) — $0.24/1M blended, AA Index 57.5
About Upstage
Upstage, a Korean AI lab, builds the Solar Pro line with a focus on efficient models that deliver usable quality at some of the lowest prices in the index.