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Upstage: Solar Pro 4

upstage/solar-pro4

canonical: upstage/solar-pro4-20260810

Descriptionfrom OpenRouter

Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...

Context length

524,288 tok

Max completion

131,072 tok

Knowledge cutoff

—

Expires

—

Added to OpenRouter

8/10/2026

Cache last refreshed

11/12/2026

Primary modality

text->text

Source

OpenRouter

Input modalities

text

Output modalities

text

Pricing

Field	Per token (USD)	Per million
prompt	0.00000015	$0.150
completion	0.0000006	$0.600
input_cache_read	0.00000003	$0.030

Supported parameters(17)

frequency_penaltyinclude_reasoninglogprobsmax_tokensparallel_tool_callspresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

OpenRouter page

Rounds

13 answersin this database. A round opens every model's answer to the same prompt.

Aug 21, 2026Home TurfHandy, Beamer, Weltnetzround answer
Aug 21, 2026Home TurfThe thwarted poetround answer
Aug 21, 2026Home TurfSay it in Koreanround answer
Aug 21, 2026Home TurfWhat the Korean title actually saysround answer
Aug 14, 2026CodingThe same soldierround answer
Aug 14, 2026CodingDrop the slinkyround answer
Aug 14, 2026CodingTwo kilobytesround answer
Aug 14, 2026CodingThe queue that stoppedround answer
Aug 13, 2026Real Life ChallengesWorth a clickin a video round answer
Aug 12, 2026Psychology & Business AcumenThe email you don't want to send50mediocrein a video round answer
Aug 12, 2026CodingThree bugs and a lie30badin a video round answer
Aug 12, 2026Real Life ChallengesTranslate video titles30badin a video round answer
Aug 11, 2026Real Life ChallengesTranslate video titlesround answer