Tier
Moderate
Headquarters
Seoul, South Korea
Founded
2020
Flagship
Solar
Models tracked
7
Artificial Analysis
Top intelligence
15.1
Artificial Analysis Index
Cheapest model
$0.00
blended /1M
Fastest output
96
tokens / sec
Flagship Model
Upstage’s top-scoring model on the Artificial Analysis Intelligence Index.
Most intelligent model
Solar Open 100B (Reasoning)
Released 2025-12-17
Intelligence
15.1
Coding
—
Math
—
In $/1M
$0.00
Out $/1M
$0.00
Speed t/s
0
Benchmark breakdown
GPQA Diamond
66
Humanity’s Last Exam
9
SciCode
27
τ²-Bench (agentic)
48
Terminal-Bench Hard
2
IFBench
58
Models & benchmarks
Every Upstage model on file — intelligence, coding, price, and speed.
| Model | Released | Intel | Coding | Math | In $/1M | Out $/1M | Speed t/s | Latency s |
|---|---|---|---|---|---|---|---|---|
| Solar Open 100B (Reasoning) | 2025-12-17 | 15.1 | — | — | $0.00 | $0.00 | 0 | 0.00 |
| Solar Pro 3 | 2026-04-06 | 14.1 | 16.2 | — | $0.15 | $0.60 | 96 | 1.22 |
| Solar Pro 2 (Preview) (Reasoning) | 2025-05-20 | 12.5 | — | — | $0.00 | $0.00 | 0 | 0.00 |
| Solar Pro 2 (Preview) (Non-reasoning) | 2025-05-20 | 10.0 | — | — | $0.00 | $0.00 | 0 | 0.00 |
| Solar Pro 2 (Reasoning) | 2025-07-09 | 9.0 | — | 61.3 | $0.00 | $0.00 | 0 | 0.00 |
| Solar Pro 2 (Non-reasoning) | 2025-07-09 | 7.8 | — | 30.0 | $0.00 | $0.00 | 0 | 0.00 |
| Solar Mini | 2024-01-25 | 6.2 | — | — | $0.15 | $0.15 | 64 | 0.67 |
Trajectory
Upstage’s model releases over time, by intelligence.
Jan 2024 · 6.2▲ +7.9 indexApr 2026 · 14.1
House strengths
Where Upstage’s lineup over-indexes, averaged across its models.
Capability profile
Reasoning
45
Coding
32
Math
64
Agentic
26
Instruction
33
Best value
Solar Pro 3
Most intelligence per dollar — 14.1 index at $0.26/1M blended.
54 index points per $1