OpenRouter

Upstage: Solar Pro 4

upstage/solar-pro-4
Context

512K

Input

text

Output

text

Tool calling

Supported

About this model

Solar Pro 4 is Upstage's flagship language model built for complex agentic workflows and long-running professional tasks. It is designed to reason across large documents, execute multi-step tool-driven workflows, work with terminal environments, and produce reliable business deliverables across extended sessions. With a 524K-token context window and up to 128K output tokens, Solar Pro 4 can process multiple reports, contracts, datasets, and other large inputs within a single workflow. It supports configurable reasoning effort, function calling, structured outputs, and strong English, Korean, and Japanese capabilities, making it suitable for enterprise agents, coding, document analysis, research, information extraction, and complex workflow automation.

Input modalities

text

Accepted as model input

Providers

Available routing options for this model through OneInfer.

Available

Input tokens

$0.090 / 1M tokens

Output tokens

$0.360 / 1M tokens

Routing

OneInfer optimized

Pricing

Current OneInfer pricing for this model.

UsagePrice
Input tokens$0.090 / 1M tokens
Output tokens$0.360 / 1M tokens
Cached input tokens$0.018 / 1M tokens

Performance & Benchmarks

Independent evaluations and live cluster operational metrics

We haven’t measured this model yet. Published academic results are under Academic Evaluations.

API Guide

API docs
  1. 1

    Generate your access token

    Use your API key to generate the JWT access token required by the Models API.

  2. 2

    Add the JWT token

    Copy the generated JWT token and replace JWT_TOKEN in the example below.

  3. 3

    Check your credits

    If your balance is too low, before calling the model.

  4. 4

    Run the API example

    Choose your preferred language, copy the example, and send your first model request.

    curl https://api.oneinfer.ai/v1/ula/chat/completions \
      -H "Authorization: Bearer $JWT_TOKEN" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "upstage/solar-pro-4",
        "messages": [
          { "role": "user", "content": "Hello!" }
        ]
      }'

Community Model Reviews & Ratings

Verified visitor & developer evaluations on Upstage: Solar Pro 4's real-world intelligence, code accuracy, and speed

4.8
Community consensus rating
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