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Upstage: Solar Pro 4.

text open weights 524K ctx
Cheapest input
$0.09/M
on OpenRouter
Cheapest output
$0.36/M
on OpenRouter
Hosted equiv.
~$0.13/hr
@ 100 tok/s on OpenRouter

Solar Pro 4 is a large language model from Upstage. It is suited for agentic workflows, office productivity, document-intensive work, and coding.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $0.09 $0.36 Launch ↗
FAQ

Frequently asked.

How do I run Upstage: Solar Pro 4?
Upstage: Solar Pro 4 is open-weight, so you can self-host on rented GPUs. See the Run It Yourself tab for GPU configurations + cost estimates, or use one of the hosted inference providers listed on this page.
Where can I access Upstage: Solar Pro 4?
Upstage: Solar Pro 4 is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Upstage: Solar Pro 4?
API pricing starts at $0.03/M input tokens and $0.12/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is Upstage: Solar Pro 4 open-source or proprietary?
Upstage: Solar Pro 4 is open-weight under the license. You can download and self-host it.