Solar Mini 4
by Upstage
Today's price · per 1M tokens
Input
$0.050
per 1M tokens
Output
$0.200
per 1M tokens
Blended
$0.088
blended $/1M — 3:1 weighted input:output
Cached input
$0.005
10% of input — prompt caching
How this price is scoped: Promotional pricing, per 1M tokens, exclusive of 10% VAT. Upstage's standard list price for Solar Mini 4 is $0.10 input / $0.01 cached input / $0.40 output. The launch promotion prices it at 50% off — $0.05 / $0.005 / $0.20 — through Oct 22 2026, and Upstage's pricing page shows the standard price struck through beside the discounted one. From Oct 23 2026 (UTC) the standard list price applies; we track that date and will publish the reversion on the day.
Price receipt
We read Upstage's own pricing page on and found Solar Mini 4 listed on its own card with a dated rate schedule that states this price for that day — that read is where the number above comes from, recorded as a new model. We keep the page text we read; its content hash is 4b4f3fd029.
Overview
Upstage's compact Solar tier, a mixture-of-experts with just 3B active parameters for high-frequency, cost-sensitive agent work, with a 512K context window. Promotional pricing is $0.05/$0.20 per 1M tokens (50% off) through Oct 22 2026; it reverts to Upstage's standard list price of $0.10/$0.40 on Oct 23 2026.
Capabilities
struck through = not supportedSpecifications
- Provider
- Upstage
- Context window
- 524K tokens
- Modality
- text
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Status
- Current
- Last updated
- Tags
Availability verified: — listed on Upstage's own page