Solar Pro 4
ModelActiveby Upstage · family “solar-pro”
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... (description from the OpenRouter listing)
in: textout: textReasoningTool useStructured output
Epoch Capabilities Index
Not scored by Epoch AI
Released
10 Aug 2026
Context window
524K tokens
Max output
131K tokens
Input $ / 1M tokens
$0.090
Output $ / 1M tokens
$0.36
Cached input $ / 1M
$0.018
Each benchmark shown separately with its own source
Benchmark results (0)
No benchmark results recorded for this model.
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
API list price over time
Price history
$ per 1M tokens
2 observations (OpenRouter listing + Internet Archive snapshots). History accumulates with every ingest run; a single point means no change has been observed yet.
Events
- Model launch50d agoUpstage releases Solar Pro 4OpenRouter models API