Upstage: solar-pro2
solar-pro2 is a reasoning model from Upstage released on May 20, 2025. It reads text and writes text, with a 66K token context window and up to 8K tokens per reply.
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It costs $0.25 per million input tokens and $0.25 per million output tokens.
It supports tool calling.
2 providers serve it, including LLMTR. The lowest input price is $0.15 per million tokens at LLMTR.
- Modalities
- In / out price
- $0.25 / $0.25 per 1M
- Context
- 66K
- Max output
- 8K
- Released
- May 20, 2025
- Knowledge cutoff
- Mar 2025
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
solar-pro2 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.25 / 1M tokens | |
|---|---|---|
| Output | $0.25 / 1M tokens |
solar-pro2 providers
2 providers serve it, including LLMTR. The lowest input price is $0.15 per million tokens at LLMTR. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Upstage First party | $0.25 | $0.25 | – | 66K | 8K |
| LLMTR | $0.15 | $0.60 | – | 66K | 8K |
What solar-pro2 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call solar-pro2 through an OpenAI compatible API.
- Tools
tools - Reasoning
reasoning - Temperature
temperature
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solar-pro2 questions
How much does the solar-pro2 API cost?
$0.25 per million input tokens and $0.25 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of solar-pro2?
65,536 tokens of input, and it can write up to 8,192 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve solar-pro2?
2 providers serve it, including LLMTR. The lowest input price is $0.15 per million tokens at LLMTR. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does solar-pro2 support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is solar-pro2 open source?
No. Upstage serves it through an API only, so you cannot download the weights or host it yourself.
When was solar-pro2 released?
May 20, 2025, with training data up to Mar 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.