Upstage models

Upstage builds the Solar models, compact releases that punch above their size on reasoning and document work. Zeplik carries Solar Mini 4 — a 35B mixture-of-experts with 3B active parameters and a 524K window, built for agentic work where response cost matters — alongside Solar Pro 4 and Solar Pro 3.

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All 2 Upstage models

Pricing at a glance

Frequently asked questions

Which Upstage models can I use on Zeplik?

Zeplik carries 2 Upstage models: Solar Mini 4 and Solar Pro 4. They all run in the same chat, so you do not need a separate Upstage account or API key.

How much do Upstage models cost on Zeplik?

Output tokens run from 2.4 to 7.2 credits per million depending on which Upstage model you pick (raw provider rates $0.20 to $0.60 per million). 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.

Which Upstage model has the largest context window?

Solar Mini 4, at 524K tokens (524,288). The context window covers the conversation plus any documents you attach.

Do Upstage models support images and tool calling?

None of the 2 accept image input, and all of them support tool calling.

Do I need a paid plan to use Upstage models on Zeplik?

Both need a paid plan (Plus or above). Usage is then billed in credits from your monthly allowance.

What is the newest Upstage model on Zeplik?

Solar Mini 4, released September 2026. Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window.

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