Solar Mini 4 is Upstage's language model with a 524K context window and up to 131K output tokens, starting at $0.05 / 1M input and $0.2 / 1M output. A compact, cost-efficient mixture-of-experts LLM with a large context window, tuned for responsive agentic applications.
Specifications
Canonical IDupstage-solar-4-mini
TypeLanguage
StatusActive
CreatorUpstageUpstage
Providers
Context Window524K tokens
Max Output131K tokens
Input ModalitiesText
Output ModalitiesText
Reasoning Effortsdefault
Release Date · 2 days ago

Capabilities

Input1/5
Text✓
Image·
Audio·
Video·
PDF·
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities6/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling✓
Structured Outputs✓
Native JSON Schema✓
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·

Pricing by Provider

US Dollar ($)
Per 1M tokens
ProviderStandard
Input
$ / 1M
Output
$ / 1M
Cache Read
$ / 1M
OpenRouter logo
OpenRouter
upstage/solar-mini4
$0.05$0.2$0.005

Cost Calculator

US Dollar ($)
Preset:

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Solar Mini 4524K$0.050$0.200Current
Solar Mini————Available
Solar Mini————Available

Other Models

ModelTierReleasedContextInput / 1MOutput / 1M
Solar Pro 4Pro524K$0.090$0.360
Solar Pro 3Pro131K$0.150$0.600
Solar Pro 2Pro————
Solar Pro 2Pro————
Solar Pro 2Pro————
Solar Pro 2 PreviewPro————
Solar Open2 250B—————
Solar Open 100B—————
Solar Large—————
Solar ProPro————

Model IDs

openrouter/upstage/solar-mini4
upstage-solar-4-mini
upstage/solar-mini4