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 $0.188 per million tokens in and $0.750 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 | $0.188 per million tokens |
| Output price | $0.750 per million tokens |
| Prompt caching | Supported — cached input is billed at the provider's cache rate, on credits and plans alike |
| 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 | About 1.8 plan credits per typical call (8k in, 1k out) |
| Routing endpoints | 1 |
Pricing
$0.188 per million tokens input · $0.750 per million tokens output
Credits pay the provider’s price plus 25%; cache hits cost less.
On a monthly plan, a typical call (8k tokens in, 1k out) uses about 1.8 plan credits, at the provider's own price.
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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