FAST & FRUGAL · Upstage

Solar Mini 4

Solar Mini 4 is a reasoning, tool-using model from Upstage in the Upstage family, living in Silvergrass Fields (fast & frugal). It reads text and writes text, with a 524K-token context window and up to 131K tokens of output. On OpenRouter it costs $0.050 per million input tokens and $0.200 per million output tokens.

See Solar Mini 4 in 3D Open in the Worktable View on OpenRouter

Specifications

Provider: Upstage
Family: Upstage
Province: Silvergrass Fields
Context window: 524K tokens
Maximum output: 131K tokens
Input / 1M tokens: $0.050
Output / 1M tokens: $0.200
Accepts: text
Produces: text
Reasoning: Yes
Tool use: Yes
Added to OpenRouter: 2026-09-23
Model ID: upstage/solar-mini4
Price history: —All recorded prices

From the 2026-10-24 catalog snapshot. Prices are US dollars per million tokens.

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