MODEL PROOF
Solar Pro 4
BETTER VALUE OPTION
A stored alternative has an equal-or-higher measured score and an equal-or-lower price.
GLM 5.3 Flash · Δ score 83.4 points · 55% lower measured price · $0.238 / 1M tokens
Gemma 4 31B is a further stored option with these losses: 524K → 262K context, 131K → 16K max output
- Independent LMArena score
- 1,386.2 ± 5.72 · 15,819 votes
- Context window
- 524.29K
- Maximum output
- 131.07K
- Input modalities
- text
- Output modalities
- text
- Published input price
- $0.300 / 1M tokens
- Published output price
- $1.20 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Price from Upstage: the cheapest offer that is serving, at standard delivery and at the maker’s precision or better, at its standard rate.
Cheaper right now: $0.090 in · $0.360 out per million tokens at Upstage, a promotion of 70%. The price on this page is Upstage’s standard rate: the ranking uses the standard rate, never a promotion.
Every price dimension · USD per million tokens
| Input | $0.300/M |
|---|---|
| Output | $1.20/M |
| Cached input | $0.060/M |
| Cache write | Unknown/M |
| Cache write 1h | Unknown/M |
| Reasoning | Unknown/M |
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
2 provider offers · rates, limits and conditions
Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| Upstageupstage/zdr Endpoint terms
| $0.090 | $0.360 | undeclared | 98.78% |
| Upstageupstage Endpoint terms
| $0.090 | $0.360 | undeclared | 94.05% |
Independent scores
| LMArena Elo | 1386.2default |
|---|
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Best rankings by task
- Web apps #34 1098
- 3D #49 1186
- Code categories #55 1188
- Game development #58 1183
- Data visualisation #59 1187
- Websites #68 1183
- UI components #71 1156
Per-task Elo and rank from Design Arena, via OpenRouter’s model feed. The rank is the feed’s, and it counts models OpenRouter does not list.
Capability
| Context window | 524K |
|---|---|
| Max output | 131K |
| Input modes | text |
| Tool use | yes |
| Reasoning | optional |
| Open weights | Unknown |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-10-06 |
| Quality data | verified |
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...
Questions this page answers
What does Solar Pro 4 cost?
$0.300/M in, $1.20/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does Solar Pro 4 have an independent quality score?
Solar Pro 4 has an LMArena score in this catalogue.
What beats Solar Pro 4?
GLM 5.3 Flash has an equal-or-higher measured score and an equal-or-lower price.
Does this page use Artificial Analysis scores for Solar Pro 4?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
MODEL MONUMENT
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The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not.
[](https://undominated.ai/models/upstage__solar-pro4/)<a href="https://undominated.ai/models/upstage__solar-pro4/"><img src="https://undominated.ai/badge/upstage__solar-pro4.svg" alt="Solar Pro 4 — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/upstage__solar-pro4.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
older than the last deploy.
