Upstage: Solar Pro 4 (upstage/solar-pro4) is a chat model from openrouter with a 524.3K-token context window; capabilities tools, reasoning; input text; output text.
524.3KContext
131.1KMax output
$0.09$ / 1M in
Pricing
Input
$0.09 / 1M tokens
Output
$0.36 / 1M tokens
Currency
USD
Note
Indicative US list price — verify with the vendor.
Indicative US list price — a reference only, verify with the vendor. Source: litellm. Last verified 2026-09-26.