Solar Pro 4 is a large language model from Upstage with a 524K token context window.
- Strengths
- The 524K context window enables handling of very long documents and extended multi-turn conversations without truncation.
- Best for
- Tasks requiring processing of large documents, lengthy code repositories, or maintaining context across many conversation turns.
- Limitations
- A larger context window increases latency and memory requirements; for simpler tasks with shorter inputs, a smaller model like Solar Mini 4 may be more efficient.
Input / 1M
$0.15
Output / 1M
$0.6
Cached input / 1M
$0.03
Context window
524K
Price history
Input (solid)Output (dashed)
Price change
- 30d
- in increased 66.7% out increased 66.7%
- 90d
- in increased 400.0% out increased 400.0%
- 1y
- in increased 400.0% out increased 400.0%
- Since launch
- in increased 400.0% out increased 400.0%
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 20 Oct 2026 | $0.15 | $0.6 | $0.03 | Imported from OpenRouter | openrouter.ai |
| 11 Sep 2026 | $0.09 | $0.36 | $0.018 | Imported from OpenRouter | openrouter.ai |
| 11 Aug 2026 | $0.03 | $0.12 | $0.006 | Imported from OpenRouter | openrouter.ai |