Upstage
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...
Available via OpenRouter: create a free account at openrouter.ai, generate an API key, then call this model as upstage/solar-pro4 through the OpenRouter API (or any OpenRouter-compatible app/client).
Official: openrouter.ai/upstage/solar-pro4