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...
With CoreAI, you can start chatting with Upstage: Solar Pro 4 instantly — no separate subscription needed. CoreAI lets you chat with Upstage: Solar Pro 4 alongside 300+ other AI models from Upstage and other providers like OpenAI, Anthropic, Google, Meta, and more.
Upstage: Solar Pro 4 holds the #137 spot for context size out of 409 chat models in the CoreAI catalog — 524K tokens, roughly 393,216 words or 786 pages of text in a single conversation. On price, it is the #7 cheapest of 134 budget-tier models by input cost. It joined the catalog on 2026-08-10. It supports step-by-step reasoning (thinking mode).
Every model in this table is available on CoreAI — open the web app and run the same prompt through Upstage: Solar Pro 4 and Upstage: Solar Pro 3 side by side to judge with your own eyes.
A typical question (about 1,000 tokens in, 500 out) runs $0.00009 on Upstage: Solar Pro 4's raw per-token rates; a heavy session with a 50K-token document costs about $0.002. On CoreAI you don't juggle these numbers — one subscription covers Upstage: Solar Pro 4 and 300+ other models under a plan usage limit, with no API keys. See plans.
Upstage: Solar Pro 4 handles 524K tokens of context — roughly 393,216 words, or about 786 pages of text in one conversation.
Upstage: Solar Pro 4's underlying rates are $0.03 per 1M input tokens and $0.12 per 1M output tokens. On CoreAI it is included in one subscription alongside 300+ models, so there is no per-token billing to manage.
No — Upstage: Solar Pro 4 is text-only. If you need image understanding, its budget-tier peers with vision are listed in the comparison table above.
Yes. Upstage: Solar Pro 4 can work through problems step by step before answering; on CoreAI you can toggle thinking mode per message.
Open the CoreAI web app or the iOS/Android app, pick Upstage: Solar Pro 4 in the model selector, and chat — no API key, no per-token billing. One subscription covers Upstage: Solar Pro 4 and 300+ other models.
The closest alternatives on CoreAI are Upstage: Solar Pro 3, Dots Studio: Dots3-Note Preview (free), Mistral: Mistral Nemo — similar tier and capability. The fastest way to choose is running one prompt through them side by side in CoreAI's Compare view.
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