Measured on Composite
This model has not carried enough traffic on Composite yet to publish a success rate, a latency figure or a traffic rank. The numbers appear here once it has.
AI model
Upstage: Solar Pro 4 (Reasoning)
upstage/solar-pro4-reasoning
Upstage: Solar Pro 4 (Reasoning) is a 524,288-token model served on Composite at $0.0288 per million tokens in and $0.360 per million tokens out.
Try in PlaygroundSpecifications
| Model ID | upstage/solar-pro4-reasoning |
|---|---|
| Provider | cv11 |
| Context window | 524,288 tokens |
| Accepts | text |
| Returns | text |
| Input price | $0.0288 per million tokens |
| Output price | $0.360 per million tokens |
| Prompt caching | Supported — cached input is 60% off the list rate on pay-as-you-go credits |
| Thinking | Optional - see "Upstage: Solar Pro 4 (Reasoning) (Reasoning)" in the catalog to turn it on by default |
| Moderated | No |
| Cost on a monthly plan | 1 request of the daily allowance per call |
| Plans that may spend on it | Every plan, plus pay-as-you-go credits |
| Routing endpoints | 1 |
Pricing
$0.0288 per million tokens input · $0.360 per million tokens output
Input and output are charged at the provider’s list price.
On a monthly plan, one call costs 1 request of that day's allowance.
Provider
cv11
Roleplay fit
This model is available on Composite alongside dozens of others from other labs, so it is easy to compare against similar options.
Context behavior
With a 524,288-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.
Cost for regular use
It is priced low enough for high-volume daily roleplay without the per-message cost adding up quickly.
From the provider
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...
Supplied by cv11, not written by Composite.
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