Upstage: Models Intelligence, Performance & Price
This analysis is intended to support you in choosing the best model provided by Upstage for your use-case.
Most Intelligent
UpdatedSolar Pro 4Solar Pro 3Intelligence index
Total 2 models
Fastest
Solar Pro 3Solar Pro 4Output speed
Total 2 models
Lowest Price
Solar Pro 3Solar Pro 4Blended price (per 1M tokens)
Total 2 models
Upstage offers 2 models, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across models.
- For intelligence, the top models on Upstage are Solar Pro 4 (28) and Solar Pro 3 (8).
- For output speed, the fastest models are Solar Pro 3 (142 t/s) and Solar Pro 4 (94 t/s).
- For latency, Solar Pro 3 (15.51s) and Solar Pro 4 (23.24s) offer the lowest time to first answer token.
- For pricing, Solar Pro 3 ($0.10) and Solar Pro 4 ($0.22) offer the lowest blended prices per 1M tokens.
- For context window size, Solar Pro 4 (512k) and Solar Pro 3 (131k) support the largest context windows on Upstage.
- Solar Pro 3 offers both the fastest output and best pricing, making it attractive for throughput-sensitive and cost-conscious applications. Solar Pro 4 leads in intelligence for tasks that require the highest quality.
Highlights
Intelligence Evaluations
Artificial Analysis Intelligence Index
Intelligence Evaluations
Agentic knowledge work, (Elo-500)/2000
Agentic real-world work tasks, (Elo-500)/2000
Agentic SaaS workflows
Agentic coding & terminal use
Coding
Reasoning & knowledge
Professional document reasoning, All-pass
Physics reasoning
Knowledge
1 - hallucination rate
Long context reasoning
Legal agentic work, criterion pass rate
Agentic business operations
Agentic scientific research workflows in a terminal
Quantitative analysis on spreadsheets & documents
Agentic tool use
Kubernetes incident root-cause analysis
Visual reasoning
Medical long context reasoning
Intelligence Index vs. Price
Context Window
Context Window
Pricing
Intelligence Index vs. Price
Performance Summary
Output Speed vs. Price
Speed
Measured by Output Speed (tokens per second)
Output Speed
Latency
Measured by Time (seconds) to First Token
Latency: Time To First Answer Token
End-to-End Response Time
Seconds to output 500 tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed
End-to-End Response Time vs. Price
Key definitions
Frequently Asked Questions
Common questions about Upstage
Upstage offers 2 models that we track: Solar Pro 4 and Solar Pro 3.
The most intelligent model available on Upstage is Solar Pro 4 with an Intelligence Index score of 28.
The fastest model on Upstage by output speed is Solar Pro 3 at 142.1 tokens per second.
The model with the lowest time to first answer token on Upstage is Solar Pro 3 at 15.51s. Lower latency means faster initial response time.
The most affordable model on Upstage by blended price is Solar Pro 3 at $0.10 per 1M tokens (7:2:1 cache hit/input/output ratio).
Prices on Upstage vary up to 2x across models, from $0.10 per 1M tokens for Solar Pro 3 to $0.22 per 1M tokens for Solar Pro 4.
Yes, Upstage offers an OpenAI-compatible API, making it easy to switch from OpenAI or use existing OpenAI SDK integrations.
Yes, all 2 models on Upstage support JSON mode for structured output.
Yes, all 2 models on Upstage support function calling (tool use).
Yes, Upstage offers 2 reasoning models: Solar Pro 4 and Solar Pro 3. Reasoning models use extended thinking to work through complex problems before providing an answer.
Yes, provider performance can vary over time due to infrastructure changes, load balancing, and updates. We continuously benchmark all providers and display historical performance trends in the "Over Time" charts.
When choosing a model on Upstage, consider: intelligence (for quality-sensitive tasks), output speed (for throughput-intensive tasks), latency (for interactive applications requiring quick first responses), pricing (for cost-sensitive workloads), and features like context window size, JSON mode, or function calling support.