How much does Solar Pro 4 cost on Zeplik?

Input tokens cost 1.8 credits per million and output tokens 7.2 credits per million (1 credit = $0.10; the raw provider rates are $0.15 and $0.60 per million). New accounts start with free credits.

How long can a conversation with Solar Pro 4 be?

Solar Pro 4 has a 524K-token context window (524,288 tokens), which covers the conversation plus any documents you attach.

Does Solar Pro 4 support images and tools?

Solar Pro 4 is text-only and supports tool calling.

Solar Pro 4

General purposeTools

Upstage · Released August 2026

Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.

It is part of Upstage's Solar line, compact models tuned for reasoning and document understanding, where Pro leads on capability and Mini trades size for cost.

Facts and pricing

Provider: Upstage
Context window: 524K tokens
Input price: 1.8 credits / 1M tokens ($0.15 raw)
Output price: 7.2 credits / 1M tokens ($0.60 raw)
Vision (image input): No
Tool calling: Yes
Extended reasoning: No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin. Raw prices shown per 1M tokens.

Try Solar Pro 4 now

Or open Zeplik with Solar Pro 4 already selected

What Solar Pro 4 is best for

Balanced everyday work: writing, questions, brainstorming and summarization
Very long documents and codebases: a 524K-token window fits entire books or repositories in one conversation
Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Example prompts

Prompts that suit a general purpose model like Solar Pro 4:

Help me outline a talk about what I learned this year
Compare these two paragraphs and tell me which is clearer and why
Draft a polite reply declining this invitation
Explain this concept with a concrete everyday analogy

Upstage family

Model	Context	Input cr/M	Output cr/M	Released
Solar Mini 4	524K	0.60	2.4	September 2026
Solar Pro 4	524K	1.8	7.2	August 2026

Model comparisons

Frequently asked questions

What is Solar Pro 4?: Solar Pro 4 is an AI model by Upstage. Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
How much does Solar Pro 4 cost on Zeplik?: Input tokens cost 1.8 credits per million and output tokens 7.2 credits per million (1 credit = $0.10; the raw provider rates are $0.15 and $0.60 per million). New accounts start with free credits.
How long can a conversation with Solar Pro 4 be?: Solar Pro 4 has a 524K-token context window (524,288 tokens), which covers the conversation plus any documents you attach.
Does Solar Pro 4 support images and tools?: Solar Pro 4 is text-only and supports tool calling.

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