--- title: "Upstage: Solar Pro 4 — price, capability and what beats it · Undominated.ai" canonical: https://undominated.ai/models/upstage__solar-pro4/ description: "Upstage: Solar Pro 4: $0.300/M in, $1.20/M out. Independent capability scores, and alternatives compared under recorded workload and capability requirements." --- # Upstage: Solar Pro 4 — price, capability and what beats it · Undominated.ai > Upstage: Solar Pro 4: $0.300/M in, $1.20/M out. Independent capability scores, and alternatives compared under recorded workload and capability requirements. [Check base rates for this workload](/check/upstage__solar-pro4/) [Cheaper alternatives](/alternatives/upstage__solar-pro4/) [Family](/families/solar/) [Compare models](https://undominated.ai/compare/?models=upstage%2Fsolar-pro4) Comparison context Choose up to three standard models in Compare. Requirements and prompt length apply in Compare. This page keeps its stated price basis and workload controls. MODEL PROOF # Solar Pro 4 Upstage · 10 Aug 2026 Balanced Summarise Chat Code gen Agentic BETTER VALUE OPTION ## A stored alternative has an equal-or-higher measured score and an equal-or-lower price. **$0.525** / 1M tokens Balanced · 3 tokens in per 1 out [GLM 5.3 Flash](/models/z-ai__glm-5.3-flash/) · Δ score 83.4 points · 55% lower measured price · $0.238 / 1M tokens [Gemma 4 31B](/models/google__gemma-4-31b-it/) is a further stored option with these losses: 524K → 262K context, 131K → 16K max output Evidence as of 06 Oct 2026 [openrouter/models](https://openrouter.ai/api/v1/models) [LMArena · cc-by-4.0](https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset) 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](#billing-details) 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) | | --- | --- | --- | --- | --- | | Seller Upstage upstage/zdr Endpoint terms Cached input /M $0.018 Context limit 524,288 tokens Output limit 131,072 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount 70% · already included in these rates Uptime · last 30 minutes 100.00% | Input $0.090 | Output $0.360 | Precision undeclared | Uptime (1d) 98.78% | | Seller Upstage upstage Endpoint terms Cached input /M $0.018 Context limit 524,288 tokens Output limit 131,072 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount 70% · already included in these rates Uptime · last 30 minutes 100.00% | Input $0.090 | Output $0.360 | Precision undeclared | Uptime (1d) 94.05% | ### Independent scores | LMArena Elo | 1386.2 default | | --- | --- | 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](https://designarena.ai), 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](https://openrouter.ai/api/v1/models) | | --- | --- | | 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 ## Save or share this proof Download proof card · 1200 × 630 Preview and more sharing options Upstage: Solar Pro 4. Balanced workload. Better value option available. Evidence as of 06 Oct 2026. Copy model link Download square card · 1080 × 1080 Copy landscape image Share landscape card ## Related - Both better and cheaper [GLM 5.3 Flash](/models/z-ai__glm-5.3-flash/) - Higher score and cheaper, with a named trade [Gemma 4 31B](/models/google__gemma-4-31b-it/) - Nearby on the capability axis [GPT-6 Luna](/models/openai__gpt-6-luna/) - Same vendor [Solar Mini 4](/models/upstage__solar-mini4/) - Upstage models [Upstage](/providers/upstage/) - Where this model appears [wire](/wire/) - Nearby on the capability axis [Qwen3 30B A3B Instruct 2507](/models/qwen__qwen3-30b-a3b-instruct-2507/) - Same vendor [Solar Pro 3](/models/upstage__solar-pro-3/) - Where this model appears [significance](/significance/) - Nearby on the capability axis [GLM 4.5 Air](/models/z-ai__glm-4.5-air/) - Where this model appears [cheapest-at](/cheapest-at/) ## Badge 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. Markdown Copy [![Solar Pro 4 — Undominated.ai dominance verdict](https://undominated.ai/badge/upstage__solar-pro4.svg)](https://undominated.ai/models/upstage__solar-pro4/) HTML Copy Solar Pro 4 — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/upstage__solar-pro4.svg](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. ## Continue your investigation - [Explore model families](/families/) - [Compare a shortlist](/compare/) - [Check a model](/check/) - [Understand the evidence](/methodology/)