What is Solar Mini 4?

Solar Mini 4 is a large language model from Upstage, released on September 22, 2026. It accepts text input.

When was Solar Mini 4 released?

Upstage released Solar Mini 4 on September 22, 2026.

How much does Solar Mini 4 cost?

Solar Mini 4 costs $0.10 per 1M input tokens and $0.40 per 1M output tokens through the Upstage API. Cached input costs $0.01 per 1M tokens. Prices are from Upstage's official pricing as of October 5, 2026.

What is Solar Mini 4's context window?

Solar Mini 4 has a 512K-token context window and can generate up to 128K output tokens.

How does Solar Mini 4 score on benchmarks?

Solar Mini 4 has 1 cited benchmark score, including τ³-Banking 47.2%. Each score links to its source.

Solar Mini 4

Upstage·Pending·Released 2026-09-22text

Context512k

Max output128k

Input / 1M$0.1 ↗

Output / 1M$0.4 ↗

Cached in$0.01

Benchmarks1

Benchmarks

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

τ³-Banking

47.2% ↗

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 Mini 4 FAQ

What is Solar Mini 4?: Solar Mini 4 is a large language model from Upstage, released on September 22, 2026. It accepts text input.
When was Solar Mini 4 released?: Upstage released Solar Mini 4 on September 22, 2026.
How much does Solar Mini 4 cost?: Solar Mini 4 costs $0.10 per 1M input tokens and $0.40 per 1M output tokens through the Upstage API. Cached input costs $0.01 per 1M tokens. Prices are from Upstage's official pricing as of October 5, 2026.
What is Solar Mini 4's context window?: Solar Mini 4 has a 512K-token context window and can generate up to 128K output tokens.
How does Solar Mini 4 score on benchmarks?: Solar Mini 4 has 1 cited benchmark score, including τ³-Banking 47.2%. Each score links to its source.

Access Solar Mini 4 and every other model through one endpoint with automatic failover: Respan gateway.