Solar Mini 4
Upstage • text#168 of 657 in intelligence
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic use cases where response...
Specifications
Context Window
524K tokens
Input Price/1M
$0.10
#250 of 792
Output Price/1M
$0.40
Parameters
—
Speed
205 tok/s
#38 of 637
Latency (TTFT)
1.5s
Max Output
131K tokens
Cost per Task
138
AA Score / US$ · higher = better
Benchmarks
Solar Mini 4 results on the main AI model evaluation benchmarks. Higher scores indicate better performance.
overall
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| AA Intelligence Index | 24.1 | 100.0 | Artificial Analysis official API |
Information
- Release date
- September 22, 2026
- Tool Calling
- ✅ Supported
- Vision
- ❌ Not supported
- Audio
- ❌ Not supported
Full Analysis: Solar Mini 4
What is Solar Mini 4?
Solar Mini 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 Mini 4 is usage-based, priced at $0.1/1M input tokens and $0.4/1M 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 Mini 4 was evaluated on 1 different benchmarks, covering categories like overall. Results show moderate 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 Mini 4 specializes in text, offering advanced capabilities for creating and processing text content.
Comparison with Alternatives
In the 2026 AI model ecosystem, Solar Mini 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 Mini 4?
Solar Mini 4 is an AI model developed by Upstage. It is a text model.
How much does Solar Mini 4 cost?
Solar Mini 4 costs $0.1/1M input tokens and $0.4/1M 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 Mini 4 compare with other models?
In available benchmarks, Solar Mini 4 scored: AA Intelligence Index: 24.1/100. See the full table above for a detailed comparison.
Is Solar Mini 4 open source?
No, Solar Mini 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 Mini 4 best for?
Solar Mini 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: October 02, 2026 • View methodology →