Solar Pro 4

upstage/solar-pro4

Maker: Upstage, South Korea
Released: 2026-08-06
Knowledge cutoff: 2026-02
Family: solar-pro
Weights: closed
Tasks: text.chat, text.reasoning, code
Cheapest offering: OpenRouter, about $0.000348 for a typical text.chat call

Try it in the sandbox Use it from the API

Offerings

Provider	Model id at the provider	Status	Price per 1M tokens	Per-unit prices	Limits	Capabilities (level)
OpenRouter	`upstage/solar-pro4`	ga	Input: $0.15 Output: $0.6 Cache read: $0.03 Unverified: sources disagree by more than 5%Since 2026-11-03 · models.dev, MIT	none	Context: 524,288 tokens Max output: 131,072 tokens	`input.text` claimed `output.text` claimed `tools` claimed `structured_output` claimed `reasoning` claimed

Quality scores

Basis	Score (0–1)	Raw	Measured	Source
`lmarena:webdev`	0.147	1370.1814	2026-10-28	LMArena, CC-BY-4.0, normalized by Nanner Tech
`lmarena:agent`	0.000	-0.2094	2026-11-02	LMArena, CC-BY-4.0, normalized by Nanner Tech

Use it from the API

Look this model up, or ask for the best model for its task on the providers that offer it. See the quickstart and the API reference.

Look up this model

curl 'https://rhumbdata.com/v1/models/upstage/solar-pro4' \
  -H "Authorization: Bearer $RHUMB_KEY"

Resolve text.chat on its providers

curl 'https://rhumbdata.com/v1/resolve?task=text.chat&providers=openrouter' \
  -H "Authorization: Bearer $RHUMB_KEY"

Built from catalog version 2026-11-04.3 of 2026-11-04. Prices are list prices per 1M tokens unless marked otherwise; every score shows its source's notice (see Attributions).