Upstage: Solar Pro 4
The Upstage Solar Pro 4 is a language model that handles text input and supports tools and reasoning capabilities. It has a context length of 524,288 tokens, allowing for extensive processing of complex inputs. For users seeking a balance between performance and cost, the Upstage Solar Pro 4 might be worth considering due to its moderate price point ($0.09/M input and $0.36/M output tokens). While it scores a blended benchmark score of 49.2 across one independent assessment, further evaluation may be necessary to determine its overall reliability.
Benchmark results
Independent, published benchmarks. Blended score 45.3 across 1 benchmark, last refreshed 2026-09-27. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 46.5 |
- Model ID
- upstage/solar-pro4
- Vendor
- upstage
- Released
- August 2026
- Tokenizer
- Other
- Input Modalities
- text
- Output Modalities
- text
- Max Output
- 131,072 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- text only
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.09/M input and $0.36/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.06 |
| A month of a busy support chatbot | 5M in / 2M out | $1.17 |
Price & spec history
Tracked daily by PicksByModel since 2026-08-11.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 2026-09-11 | $0.09 | $0.36 | 524,288 |
| 2026-08-11 | $0.03 | $0.12 | 524,288 |
Category rankings
Where Upstage: Solar Pro 4 places across the 1 category it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #25 | Code CompletionCode · of 25 ranked | 132 |
Similar models
Quick answers
- How much does Upstage: Solar Pro 4 cost?
- $0.09 per million input tokens and $0.36 per million output tokens.
- What is Upstage: Solar Pro 4's context window?
- 524,288 tokens, roughly 786 pages of text in a single request.
- Does Upstage: Solar Pro 4 support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Upstage: Solar Pro 4 process images?
- No, it is text-only on the input side.