Today's price · per 1M tokens
Input
$0.300
per 1M tokens
Output
$1.20
per 1M tokens
Blended
$0.525
blended $/1M — 3:1 weighted input:output
Cached input
$0.060
20% of input — prompt caching
How this price is scoped: Standard list pricing, per 1M tokens, exclusive of 10% VAT: input $0.30, cached input $0.06, output $1.20 — the figures Upstage's rate card carries for Solar Pro 4 now that the launch promotion has ended. The promotion ran in three windows: free until Aug 11 2026, then 90% off ($0.03 / $0.006 / $0.12) until Sep 11 2026, then 70% off ($0.09 / $0.018 / $0.36) with Oct 9 2026 the last discounted day. Upstage states that standard pricing applies from Oct 10 2026 (UTC).
Price receipt
Partial receipt. We read Upstage's own pricing page on and found Solar Pro 4 listed there, with every price above printed on that page. What we could not establish is where this model's entry ends — it runs past the point our reader can follow — so we have not machine-confirmed that these figures sit on its own line rather than a neighbouring one. We keep the page text we read; its content hash is f4159f290b. Check the provider's page before relying on it.
Overview
Upstage's agentic Solar flagship, successor to Solar Pro 3, with a 512K context window and up to 128K output tokens. Priced at Upstage's standard list rate of $0.30/$1.20 per 1M tokens since Oct 10 2026, when the launch promotion ended.
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is better- AA Intelligence Index: 42 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- LMSYS Chatbot Arena: 1376.4 ELO (Human preference)
- Ranks #72 of 100 benchmarked models by average score
- Ranks #102 of 195 comparably-measured models by percentile score, across 3 independent measurements
- Ranks #35 of 195 comparably-tested models by normalized performance per dollar
- Strongest at Terminal-Bench 2.1 — 57%, #36 of 48
59.3 tokens/sec output
Source: Artificial Analysis, LMSYS Chatbot Arena (UC Berkeley), Upstage Solar Pro 4 launch blog · updated · See full rankings →
Specifications
- 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