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Upstage: Solar Pro 4
upstage/solar-pro4-20260810
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...
Upstage: Solar Pro 4 usage over time
OpenRouter share of tokens, by day.
Upstage: Solar Pro 4 holds 1.04% today, up from 0.45% at the start of the visible window.
Rank history
Adoption curve vs the pantheon
Upstage: Solar Pro 4's share plotted against days since first tracked, overlaid on other current leaders on the same axis. The question every new-model page asks: is this one going to make it?
Citable stat
As of 2026-09-01, Upstage: Solar Pro 4 holds 1.0% of OpenRouter token share, up 0.59pp over 30 days. Source: Tidelines (OpenRouter).
Cost per session
Median dollars spent on one Upstage: Solar Pro 4 session, by coding agent and session length.
Token rate sets the price; session length and reasoning set the bill.
| Agent | 2–9 turns | 10–49 turns | 50+ turns |
|---|---|---|---|
| Hermes Agent | $0.0019 | $0.022 | $0.148 |
Where to run it
Upstage: Solar Pro 4 pricing by provider
Per-provider pricing, context, and uptime via OpenRouter. Sorted by output price.
Upstage: Solar Pro 4 is served by 1 tracked endpoint on OpenRouter. The cheapest output price is $0.12 per million tokens from Upstage. The largest context window offered is 524k tokens. Prices are list rates and refresh daily.
| Provider | Input $/M | Output $/M | Context | Uptime |
|---|---|---|---|---|
| Upstage | $0.03 | $0.12 | 524k | 99.96% |