Solar Pro4
Upstage
Key facts · verified Oct 30, 2026
Solar Pro4 is an Upstage model. Its API price is $0.30 per million input tokens and $1.20 per million output tokens (promotional $0.09 / $0.36 until 20 Oct 2026, then $0.15 / $0.60). Its context window is 524.3K tokens. It ranks #183 on LMArena's text leaderboard (Elo 1388, read 1 Nov 2026). Source: upstage.ai.
Solar Pro4 is a model from Upstage. Upstage lists a standard API price of $0.30 per million input tokens and $1.20 per million output tokens, with a promotional rate in effect until 20 October 2026, and a context window of 524.3K tokens. On LMArena's text leaderboard it holds 1388 Elo (rank 183).
Pricing & specs checkedSource: vendor documentation · checked Oct 30, 2026LMArena: 1388 Elo (rank 183) · source · retrieved Nov 1, 2026
Full Specifications
$0.30 / $1.20 per million tokens | |
|---|---|
| Identity | |
| Developer | Upstage |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $0.525 / 1M tokens |
| Input price | $0.300 / 1M tokens |
| Output price | $1.200 / 1M tokens |
| Capacity | |
| Context window | 524.3K tokens |
| Measured quality | |
| LMArena Elo | 1388 (checked Nov 2026) |
| LMArena rank | Rank 183 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 2644 |