Solar Pro 4
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 work, and coding.
upstage/solar-pro4
- Context
- 524k tokens
- Completion cap
- 131,072
- Tools
- Yes
- JSON
- Yes
- Released
- 2026-08-10
Call it from Geek Hub
Same OpenAI SDK. Change the base URL and the model id.
curl https://api.geekhub.mx/v1/chat/completions \
-H "Authorization: Bearer $GEEKHUB_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "upstage/solar-pro4",
"messages": [{"role": "user", "content": "Hola"}]
}'Frequently asked questions
- What is Solar Pro 4?
- 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 work, and coding. Solar Pro 4 runs on the Geek Hub API (OpenAI-compatible). Model id: upstage/solar-pro4.
- Is Solar Pro 4 free?
- No. Input is $0.0327 per 1M tokens and output is $0.1308 per 1M tokens on Geek Hub (markup included).
- What is the context length of Solar Pro 4?
- Solar Pro 4 has a 524k tokens context window. It supports up to 131,072 completion tokens.
- Does Solar Pro 4 support tool calling and structured outputs?
- Solar Pro 4 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
- When was Solar Pro 4 released?
- Solar Pro 4 was released on 2026-08-10.