Upstage: Solar Pro 4
Analysis Summary
Solar Pro 4 from Upstage is a coding-focused model with a measured intelligence index of 41.6 and coding index of 52.7. Tool use and function calling strengthen its operational profile, while the 524K-token context supports substantial codebases, technical briefs, and document sets. Its text-only modality limits visual content workflows.
The model fits software engineering assistance, structured SEO production, API-connected automation, and agent tasks where coding accuracy matters more than frontier reasoning. Its very low listed pricing makes it especially attractive for sustained workloads and for routing routine technical requests away from premium models. Use Solar Pro 4 as a high-volume engineering and automation workhorse, while reserving harder strategic reasoning and multimodal tasks for a stronger alternative.
Assessed August 23, 2026
Editorial notes
Solar Pro 4 pairs very strong coding with tool and function-calling support, a 524K-token context, and exceptionally low pricing. Reasoning is strong but below the frontier, making it a compelling production workhorse for technical and structured tasks.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Solar Pro 4 pairs very strong coding with tool and function-calling support, a 524K-token context, and exceptionally low pricing. Reasoning is strong but below the frontier, making it a compelling production workhorse for technical and structured tasks.
How Upstage: Solar Pro 4 compares
Upstage: Solar Pro 4 ranks #60 of 433 AI models we track for overall intelligence, #64 of 206 for coding, #52 of 188 for agentic tasks. Its 524K-token context window is larger than 77% 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 business fit. 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?
Pick the job that looks most like yours, then fine-tune with the sliders. Estimates update live.
A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 748 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 #64 of 206 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.