Solar Pro 3 is a large language model from Upstage, released on January 26, 2026. It accepts text input.

When was Solar Pro 3 released?

Upstage released Solar Pro 3 on January 26, 2026.

How much does Solar Pro 3 cost?

Solar Pro 3 costs $0.15 per 1M input tokens and $0.60 per 1M output tokens through the Upstage API. Cached input costs $0.015 per 1M tokens. Prices are from Upstage's official pricing as of October 5, 2026.

What is Solar Pro 3's context window?

Solar Pro 3 has a 128K-token context window.

How does Solar Pro 3 score on benchmarks?

Solar Pro 3 has 12 cited benchmark scores, including AIME'26 83%, Arena-hard-v2 74.7% and GPQA-Diamond 71.92%. Each score links to its source.

Solar Pro 3

Upstage·Pending·Released 2026-01-26text

Context128k

Max output-

Input / 1M$0.15 ↗

Output / 1M$0.6 ↗

Cached in$0.015

Benchmarks12

Benchmarks

Cited public sources · rank is exact-benchmark, apples-to-apples

AIME'26

83% ↗

Arena-hard-v2

74.7% ↗

GPQA-Diamond

#7/871.92% ↗

HLE

#2/311.91% ↗

HMMT'26

65.91% ↗

IFBench

#6/1273.13% ↗

Ko-Arena-hard-v2

78.2% ↗

LCB.v1-6

77.73% ↗

MMLU PRO (0shot, cot)

81.24% ↗

SWE Bench

28.57% ↗

Tau2-all

72.34% ↗

Terminal Bench 2

#3/310.11% ↗

Compare

vs Gemini 4 Argon vs GPT-6.1 Sol vs Claude Sonnet 5.5 vs Muse Spark 1.3 vs GPT-6 Sol vs GPT-6 Luna vs Claude Opus 5.5 vs GPT-6 Astra

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Solar Pro 3 FAQ

What is Solar Pro 3?: Solar Pro 3 is a large language model from Upstage, released on January 26, 2026. It accepts text input.
When was Solar Pro 3 released?: Upstage released Solar Pro 3 on January 26, 2026.
How much does Solar Pro 3 cost?: Solar Pro 3 costs $0.15 per 1M input tokens and $0.60 per 1M output tokens through the Upstage API. Cached input costs $0.015 per 1M tokens. Prices are from Upstage's official pricing as of October 5, 2026.
What is Solar Pro 3's context window?: Solar Pro 3 has a 128K-token context window.
How does Solar Pro 3 score on benchmarks?: Solar Pro 3 has 12 cited benchmark scores, including AIME'26 83%, Arena-hard-v2 74.7% and GPQA-Diamond 71.92%. Each score links to its source.

Access Solar Pro 3 and every other model through one endpoint with automatic failover: Respan gateway.