Upstage: Solar Pro 4
Analysis Summary
Upstage Solar Pro 4 is a text model with tool use, function calling, and a 524K context window. Its pricing is exceptionally low at $0.03 per million input tokens and $0.12 per million output tokens, making it well suited to large-scale processing and experimentation where context volume matters.
The model could support SEO pipelines, content transformation, document analysis, extraction, and tool-connected automation. The supplied record does not include reasoning, coding, agentic, or content benchmarks, so its ability to follow nuanced briefs, maintain editorial quality, or complete multi-step tasks reliably is unknown. That uncertainty matters for direct client delivery.
Adopt it first for high-volume, low-risk workflows with automated checks and human sampling. Its economics justify broad testing, while difficult strategy and autonomous engineering should remain with benchmarked models.
Assessed August 12, 2026
Editorial notes
Solar Pro 4 offers tool use, function calling, and a 524K context window at exceptionally low pricing. It is a compelling value candidate, though its lack of benchmark data leaves complex production performance unverified.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Solar Pro 4 offers tool use, function calling, and a 524K context window at exceptionally low pricing. It is a compelling value candidate, though its lack of benchmark data leaves complex production performance unverified.
How Upstage: Solar Pro 4 compares
Upstage: Solar Pro 4 ranks #54 of 425 AI models we track for overall intelligence, #58 of 198 for coding, #46 of 180 for agentic tasks. Its 524K-token context window is larger than 79% of the models we list. At $0.03 per million input tokens it is cheaper than 79% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on value. The pulled-in technical corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $0.03 | $0.000030 |
| Output | $0.12 | $0.000120 |
What would Upstage: Solar Pro 4 cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 701 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save Upstage: Solar Pro 4 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout Upstage: 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..
Frequently asked questions about Upstage: Solar Pro 4
How much does Upstage: Solar Pro 4 cost?
Upstage: Solar Pro 4 costs $0.03 per million input tokens and $0.12 per million output tokens.
What is the context window of Upstage: Solar Pro 4?
Upstage: Solar Pro 4 has a context window of 524,288 tokens (524K).
Is Upstage: Solar Pro 4 good for coding?
On our coding benchmark index, Upstage: Solar Pro 4 ranks #58 of 198 models, placing it in the broader range of the field for code generation and debugging.
What can Upstage: Solar Pro 4 do?
Upstage: Solar Pro 4 supports tool use and function calling.
Who created Upstage: Solar Pro 4?
Upstage: Solar Pro 4 is developed by Upstage and was released on August 10, 2026.