DEEP REASONING · Upstage
Solar Pro 4
Solar Pro 4 is a reasoning, tool-using model from Upstage in the Upstage family, living in The High Peaks (deep reasoning). It reads text and writes text, with a 524K-token context window and up to 131K tokens of output. On OpenRouter it costs $0.150 per million input tokens and $0.600 per million output tokens.
See Solar Pro 4 in 3DOpen in the WorktableView on OpenRouter
Specifications
- Provider
- Upstage
- Family
- Upstage
- Province
- The High Peaks
- Context window
- 524K tokens
- Maximum output
- 131K tokens
- Input / 1M tokens
- $0.150
- Output / 1M tokens
- $0.600
- Accepts
- text
- Produces
- text
- Reasoning
- Yes
- Tool use
- Yes
- Added to OpenRouter
- 2026-08-10
- Model ID
upstage/solar-pro4- Price history
- —All recorded prices
From the 2026-10-24 catalog snapshot. Prices are US dollars per million tokens.