Solar Pro 4

upstage/solar-pro4

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...

InputText
OutputText
Input / Outputclub$0.0954 / $0.3816per 1M tokens · USD
Context window524.3Ktoken
Maximum output131.1Ktoken

Pricing

Current model usage rates. Choose your plan to see its published prices.

Pricing
UsagePricing
InputUS$0.0954/ 1M token
Cache readUS$0.01908/ 1M token
OutputUS$0.3816/ 1M token

Membership and model usage are billed separately. Compare plans

Capabilities

Input
Text
Output
Text
Context window
524,288 token
Maximum output
131,072 token

Providers

Model supply available through Vecbase.

Via OpenRouter

Access is subject to your account’s permissions and model availability.

Frequently asked questions

What is Solar Pro 4, and who develops it?

Solar Pro 4 is a model from upstage. Its model ID on Vecbase is upstage/solar-pro4. 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...

How much does Solar Pro 4 cost on Vecbase?

For Solar Pro 4, the Club plan lists USD 0.0954 per 1 million input tokens and USD 0.3816 per 1 million output tokens, as of 10/22/2026, 6:53:17 PM UTC. See the pricing table for cache rates, input-length tiers and other usage types. Membership fees are separate.

How many tokens fit in Solar Pro 4’s context window?

Solar Pro 4 has a context window of 524,288 tokens. Input and output must fit within the limits of the API you use.

What is the maximum output length for Solar Pro 4?

Solar Pro 4 can generate up to 131,072 tokens per response. Your API or request settings may set a lower limit.

Can Solar Pro 4 call tools in an agent workflow?

Yes. Solar Pro 4 supports tool calling. Your application provides the tool definitions and runs the tools the model requests.

Does Solar Pro 4 support structured outputs?

Yes. Solar Pro 4 supports structured output. Set the required format in your API request and check the returned data before using it.

Which input and output formats does Solar Pro 4 support?

Solar Pro 4 accepts Text and produces Text.

Which providers make Solar Pro 4 available through Vecbase?

Vecbase offers Solar Pro 4 through OpenRouter. Availability may vary by provider.

Which model ID should an agent use to request Solar Pro 4?

Use upstage/solar-pro4 as the model identifier for Solar Pro 4. See Vecbase’s API documentation for authentication, required inputs and supported request formats.

What does an agent need to access Solar Pro 4 through Vecbase?

To use Solar Pro 4, you need an authenticated account with the required permissions, sufficient balance and the relevant capability enabled. See the documentation for setup.

Is a release date available for Solar Pro 4?

We do not yet have a confirmed release date for Solar Pro 4.

Which models can I compare with Solar Pro 4 on Vecbase?

You can compare Solar Pro 4 with Solar Pro 3 (upstage/solar-pro-3), Vecbase Flash (vecbase-1.0-lite), and Vecbase (vecbase-1.0). Check their capabilities and prices to find the best fit for your task.