upstage / text-generation API-only released 2026-09-23

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...

Input / 1M
$0.05
Output / 1M
$0.20
Context
524.3K
AA Intelligence
24.1
Closed weights — available only as a hosted API text → text View on OpenRouter ↗

Pricing

via OpenRouter · USD per 1M tokens · synced 2026-10-24
$0.05
input / 1M
$0.20
output / 1M
$0.005
cached input / 1M
$0.25
1M in + 1M out
Context window
524,288 tokens
Max output
131,072 tokens
Providers
1
Cheapest provider
Upstage · $0.05 / $0.20
Best throughput
—
AA Intelligence / Coding / Agentic
24.1 / — / —
✓ Tool calling ✓ Reasoning ✓ Structured outputs ✗ Image input ✗ File input ✗ Audio input ✓ Prompt caching

Price history

tracking started — chart appears after 7 days of snapshots (6 recorded)
Current: $0.05 input · $0.20 output per 1M tokens

Benchmarks

Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.

AA Intelligence Index
24.1
AA Coding Index
—
AA Agentic Index
—
Design Arena
CategoryEloWin %Rank
codecategories 1148 32% #86
gamedev 1108 28.4% #94
uicomponent 1083 25.8% #101
website 1156 33.1% #91

Providers

1 provider · per 1M tokens · last 30 min metrics
ProviderQuantContextInputOutputUptimeTok/s
Upstage unknown 524.3K $0.05 $0.20 100% —
Upstage unknown 524.3K $0.05 $0.20 100% —
Provider data from OpenRouter's endpoint listing, refreshed daily.

Specifications

Organisation
upstage
Released on OpenRouter
2026-09-23
Context window
524,288 tokens
Max output
131,072 tokens
Input
text
Output
text
Tokenizer
Other
Moderated by provider
No
OpenRouter id
upstage/solar-mini4
Compare with
Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.