Solar Pro 4
Upstage • text#78 of 571 in intelligence
Solar Pro 4 is a large language model from Upstage. It is suited for agentic workflows, office productivity, document-intensive work, and coding.
Specifications
Context Window
524K tokens
Input Price/1M
$0.30
#359 of 686
Output Price/1M
$1.20
Parameters
—
Speed
57 tok/s
#209 of 525
Latency (TTFT)
2.3s
Max Output
131K tokens
Cost per Task
79.2
AA Score / US$ · higher = better
Benchmarks
Solar Pro 4 results on the main AI model evaluation benchmarks. Higher scores indicate better performance.
Coding
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| AA Coding Index | 52.7 | 100.0 | Artificial Analysis official API |
overall
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| LMArena Elo | 1377.0 | 2000.0 | Crowdsourced blind pairwise comparisons |
| AA Intelligence Index | 41.6 | 100.0 | Artificial Analysis official API |
Information
- Release date
- August 06, 2026
- Tool Calling
- ✅ Supported
- Vision
- ❌ Not supported
- Audio
- ❌ Not supported
Full Analysis: Solar Pro 4
What is Solar Pro 4?
Solar Pro 4 is an AI model developed by Upstage, classified as a text model. It focuses on text processing and natural language generation. As a proprietary model, it is available via Upstage's cloud API. With a context window of 524K tokens, it is suitable for processing long documents such as contracts, books, and complete codebases.
Pricing & Costs in 2026
Solar Pro 4 is usage-based, priced at $0.3/1M input tokens and $1.2/1M output tokens. For context: 1 million tokens is approximately 750,000 words, or about 10 average-length books. At this aggressive price point, it is one of the most cost-effective options on the market, ideal for high-volume applications like chatbots, bulk document analysis, and automation.
Benchmarks & Performance
Solar Pro 4 was evaluated on 3 different benchmarks, covering categories like Coding, overall. Results show exceptional performance across available evaluations.
It's important to note that benchmarks measure specific aspects and don't capture the full user experience. Factors like instruction adherence, behavior in long conversations, and real-world task quality vary significantly between models and aren't always reflected in standard scores.
Recommended Use Cases
Solar Pro 4 specializes in text, offering advanced capabilities for creating and processing text content.
Comparison with Alternatives
In the 2026 AI model ecosystem, Solar Pro 4 competes directly with similarly capable models. Upstage competes in this segment against OpenAI, Anthropic, Google, and Meta. The choice between models depends on the specific use case, budget, latency requirements, and need for features like multimodality and tool calling.
For a detailed side-by-side comparison, use our comparison tool or check the overall model ranking.
Frequently Asked Questions
What is Solar Pro 4?
Solar Pro 4 is an AI model developed by Upstage. It is a text model.
How much does Solar Pro 4 cost?
Solar Pro 4 costs $0.3/1M input tokens and $1.2/1M output tokens. For heavy usage (e.g., a chatbot handling 100k messages/month), costs can range from $10 to $1,000 depending on volume.
How does Solar Pro 4 compare with other models?
In available benchmarks, Solar Pro 4 scored: AA Coding Index: 52.7/100, LMArena Elo: 1377/2000, AA Intelligence Index: 41.6/100. See the full table above for a detailed comparison.
Is Solar Pro 4 open source?
No, Solar Pro 4 is a proprietary model from Upstage. It is available via cloud API. For open source alternatives, check our open source model ranking.
What is Solar Pro 4 best for?
Solar Pro 4 excels at general-purpose language tasks. With its large context window, it handles long documents, codebases, and extended conversations. It supports tool calling for API integrations and automation.
Last updated: August 18, 2026 • View methodology →