# Solar Pro 4 — price & specs

Source: https://modelbank.ai/models/solar-pro4 · updated 2026-11-12 · ModelBank

| Field | Value |
|---|---|
| Vendor | Upstage |
| Input price | $0.15 / 1M tokens |
| Output price | $0.6 / 1M tokens |
| Cached input | $0.03 / 1M tokens |
| Context window | 524,288 tokens |
| Max output | 131,072 tokens |
| Input modalities | text |
| Reasoning / tool use | yes / yes |
| Intelligence / coding index | 28.2 / 52.7 |
| Released | 2026-08-10 |
| Retirement date | none announced |

## About

Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...

## Price history

- 2026-09-24: $0.09 in / $0.36 out
- 2026-10-20: $0.15 in / $0.6 out

## Cheaper alternatives with similar intelligence

- [GLM 5.3 Flash](https://modelbank.ai/models/glm-5.3-flash): $0.0399 / $0.0784, intelligence 27.8
- [DeepSeek V4.1 Flash 1017](https://modelbank.ai/models/deepseek-v4.1-flash-1017): $0.098 / $0.29, intelligence 28.6
- [MiMo-V2.6-Flash](https://modelbank.ai/models/mimo-v2.6-flash): $0.14 / $0.28, intelligence 26.7
- [Claude Haiku 5.5](https://modelbank.ai/models/claude-haiku-5.5): $0.1 / $0.5, intelligence 36.5
- [GPT-6 Luna](https://modelbank.ai/models/gpt-6-luna): $0.1 / $0.5, intelligence 27.9

JSON: https://modelbank.ai/api/v1/models/solar-pro4