Solar Pro 4 is a Upstage closed-API frontier model. CompareLLM Coding Estimated rating is 1540. Active context window extends to 524k tokens. Commercial API token pricing is listed at $0.09/1M tok input and $0.36/1M tok output per 1M tokens. 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... Numbers below are dated snapshots from empirical benchmark harnesses.
Independent evaluation answering: "Is Solar Pro 4 the right model for your workload & budget?"
Listed output price $0.36/1M tokens. Quality is the category rating above, not this price.
Dated snapshot metrics aggregated from official evaluators and API providers with visual relative score bars.
Our category lists (Coding, Reasoning, Chat, Agents). Named suites such as SWE-bench Pro are recipe inputs, not this rating.
LMArena, SWE-bench Pro, LiveBench and similar suites appear with a source and as-of date. They are not CompareLLM's rating.
How much of the recipe is present. Missing inputs stay missing; they are never filled with 0 or 50.
Compact streaming class. Exact tok/s stays in the fact sheet, not in compact cells.
Compact class for time-to-first-token. Exact milliseconds stay in the fact sheet.
Commercial API price per 1 Million prompt/output tokens (~750k words).
| Benchmark Metric & Meaning | Reported Score & Capability Fill | CompareLLM Review |
|---|---|---|
Context window (tokens) Context Window Capacity (tokens) | 524k tokens | Source not recorded · Sep 16, 2026Maximum input context on the same endpoint. |
Output token price Cost to Generate (Output tokens) | $0.36/1M tok | Source not recorded · Sep 16, 2026Published output price on the same endpoint. |
Cached input token price Cost to Reuse Cached Input | $0.018/1M tok | Source not recorded · Sep 16, 2026Published cache-read price on the same endpoint. |
Time to first token Waiting Time (before it replies) | 2s+ | Source not recorded · Sep 16, 2026Median time to first token over the same window for this endpoint. |
Input token price Cost to Prompt (Input tokens) | $0.09/1M tok | Source not recorded · Sep 16, 2026Published input price on the endpoint this sheet is read from. |
Maximum output (tokens) Maximum Response Length | 131k tokens | Source not recorded · Sep 16, 2026Maximum completion tokens for one request on the same endpoint. |
Generation speed (tok/s) Writing Speed (tok/s) | <50 tok/s | Source not recorded · Sep 16, 2026Median output throughput over OpenRouter's trailing thirty-minute window for this endpoint. |
Peers in the same closed API frontier performance tier — not a jump to an unrelated frontier SKU.
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Models may use different benchmarks and test settings. This is an indicative composite, not a controlled head-to-head comparison or community Elo. Admin-approved sentiment estimates fill categories without accepted benchmark results. Estimates are labelled and do not increase benchmark coverage. Coverage refers to the configured recipe, not confidence.
Release recent-models-2026-09-23-r1 · recipe reported-text-2026-09-11-r1 · method reported-with-estimates-v2 · research through 2026-09-23
Overall benchmark coverage includes missing applicable categories. Estimated categories contribute to the rating but add no benchmark coverage.
Editorial estimate, anchored to the Artificial Analysis Intelligence Index v4.3, on which Solar Pro 4 scores 28, and placed within the 48-66 band this catalog's measured results occupy for this category. AA's index is a composite of ten evaluations and is not this category's recipe, so this is an ordering anchor rather than a measurement. Any accepted result that clears the evidence thresholds replaces it.
As of 2026-09-23 · review on 2026-12-23 · Editorial estimate (not a benchmark result)
Sentiment source 1 →Missing benchmark families: repository-engineering, terminal-work, frontiercode.
Editorial estimate, anchored to the Artificial Analysis Intelligence Index v4.3, on which Solar Pro 4 scores 28, and placed mid-range, because this category has too few measured results to define a band. AA's index is a composite of ten evaluations and is not this category's recipe, so this is an ordering anchor rather than a measurement. Any accepted result that clears the evidence thresholds replaces it.
As of 2026-09-23 · review on 2026-12-23 · Editorial estimate (not a benchmark result)
Sentiment source 1 →Missing benchmark families: graduate-science, advanced-mathematics, broad-academic, interactive-abstraction.
Editorial estimate, anchored to the Artificial Analysis Intelligence Index v4.3, on which Solar Pro 4 scores 28, and placed mid-range, because this category has too few measured results to define a band. AA's index is a composite of ten evaluations and is not this category's recipe, so this is an ordering anchor rather than a measurement. Any accepted result that clears the evidence thresholds replaces it.
As of 2026-09-23 · review on 2026-12-23 · Editorial estimate (not a benchmark result)
Sentiment source 1 →Missing benchmark families: constrained-story-writing, instruction-compliance.
Editorial estimate, anchored to the Artificial Analysis Intelligence Index v4.3, on which Solar Pro 4 scores 28, and placed within the 59-66 band this catalog's measured results occupy for this category. AA's index is a composite of ten evaluations and is not this category's recipe, so this is an ordering anchor rather than a measurement. Any accepted result that clears the evidence thresholds replaces it.
As of 2026-09-23 · review on 2026-12-23 · Editorial estimate (not a benchmark result)
Sentiment source 1 →Missing benchmark families: professional-computer-tasks, desktop-use, workflow-automation, web-research.
Editorial estimate, anchored to the Artificial Analysis Intelligence Index v4.3, on which Solar Pro 4 scores 28, and placed mid-range, because this category has too few measured results to define a band. AA's index is a composite of ten evaluations and is not this category's recipe, so this is an ordering anchor rather than a measurement. Any accepted result that clears the evidence thresholds replaces it.
As of 2026-09-23 · review on 2026-12-23 · Editorial estimate (not a benchmark result)
Sentiment source 1 →Missing benchmark families: conversation-quality, support-task-completion, instruction-compliance.
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solar-pro4upstage/solar-pro4Concise empirical overview formatted for citations and prompt context
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