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upstage · API model

Solar Mini 4

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. It is built for agentic use cases where response...

Context
524K
Input / 1M
$0.05
Output / 1M
$0.2
Released
Sep 23, 2026
Specifications

Solar Mini 4 specs

Provider
upstage
Type
API model
Model ID
upstage/solar-mini4
Context window
524,288 tokens524K
Input price
$0.05per 1M input tokens
Output price
$0.2per 1M output tokens
Accepts
text
Produces
text
Released
Sep 23, 2026
Popularity
38/100position #24 in OpenRouter's weekly usage ranking
Source
OpenRouter
Overview

About Solar Mini 4

Solar Mini 4 is an API model from upstage, released on Sep 23, 2026, with a context window of 524,288 tokens, pricing of $0.05 per million input tokens and $0.2 per million output tokens. It accepts text input and produces text output.

At listed prices, a request with 10,000 input tokens and 1,000 output tokens costs about $0.0007.

Specs are sourced from OpenRouter and were last checked on Nov 3, 2026. Always confirm current pricing and limits with the provider before production use.

Tool callingStructured outputsJSON modeReasoning
FAQ

Solar Mini 4 questions

What is the context window of Solar Mini 4?

Solar Mini 4 supports a context window of 524,288 tokens.

How much does Solar Mini 4 cost?

Solar Mini 4 is listed at $0.05 per million input tokens and $0.2 per million output tokens on OpenRouter.

When was Solar Mini 4 released?

Solar Mini 4 was published on Sep 23, 2026.

What inputs does Solar Mini 4 accept?

Solar Mini 4 accepts text input and produces text output.