Upstage model product
Solar Pro 4
A reasoning-focused agentic text-to-text LLM from Upstage for multi-step tasks.
Updated Sep 8, 2026. Default version: Solar Pro 4
LLMBoard Score56.6Solar Pro 4
Coverage20%9 benchmark families
Context window524.3KTokens
Official input price$0.30Upstage API
Solar Pro 4 Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
Solar Pro 4 Benchmark Results
Benchmark scores for Solar Pro 4.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkTau3 Banking | Score23.00% | Rank03 | Participants7 | Percentile66.67% | EvidenceC | Evaluated |
| BenchmarkAA-LCR | Score71.00% | Rank04 | Participants19 | Percentile83.33% | EvidenceC | Evaluated |
| BenchmarkLiveCodeBench | Score87.80% | Rank04 | Participants75 | Percentile95.95% | EvidenceC | Evaluated |
| BenchmarkAIME 2026 | Score95.30% | Rank07 | Participants22 | Percentile71.43% | EvidenceC | Evaluated |
| BenchmarkMMLU-Pro | Score86.30% | Rank13 | Participants138 | Percentile91.24% | EvidenceC | Evaluated |
| BenchmarkTerminal-Bench 2.1 | Score57.00% | Rank29 | Participants35 | Percentile17.65% | EvidenceC | Evaluated |
| BenchmarkLM Arena Agent Steerability | Score-1.32% | Rank31 | Participants49 | Percentile37.50% | EvidenceA | Evaluated |
| BenchmarkGPQA | Score89.00% | Rank33 | Participants247 | Percentile86.99% | EvidenceC | Evaluated |
| BenchmarkLM Arena Agent Task Outcome Explicit | Score-8.60% | Rank42 | Participants49 | Percentile14.58% | EvidenceA | Evaluated |
| BenchmarkLM Arena Agent Leaderboard | Score-9.87% | Rank43 | Participants49 | Percentile12.50% | EvidenceA | Evaluated |
| BenchmarkLM Arena Agent Tool Hallucination | Score-0.79% | Rank43 | Participants49 | Percentile12.50% | EvidenceA | Evaluated |
| BenchmarkLM Arena Agent Praise Complaint | Score-13.71% | Rank45 | Participants49 | Percentile8.33% | EvidenceA | Evaluated |
| BenchmarkLM Arena Agent Bash Recovery Steps | Score-24.95% | Rank46 | Participants49 | Percentile6.25% | EvidenceA | Evaluated |
| BenchmarkBrowseComp | Score49.20% | Rank49 | Participants63 | Percentile22.58% | EvidenceC | Evaluated |
| BenchmarkSWE-Bench Verified | Score70.60% | Rank62 | Participants113 | Percentile45.54% | EvidenceC | Evaluated |
| BenchmarkLM Arena Webdev | Score1,370.72 rating | Rank68 | Participants97 | Percentile30.21% | EvidenceA | Evaluated |
| BenchmarkLM Arena Text Factuality | Score1,396.98 rating | Rank105 | Participants121 | Percentile13.33% | EvidenceA | Evaluated |
| BenchmarkLM Arena Text | Score1,377.54 rating | Rank115 | Participants210 | Percentile45.45% | EvidenceA | Evaluated |
| BenchmarkLM Arena Text Style Control | Score1,376.84 rating | Rank127 | Participants210 | Percentile39.71% | EvidenceA | Evaluated |
Solar Pro 4 Arena Results
Preference and agent-evaluation results for the default version.
Sort by
Arena | Category | Rank | Rating / score | Votes | Observations | Result date |
|---|
| Arenaagent steerability | Categoryoverall | Rank31 | Rating / score-0.01 | VotesN/A | Observations3.4K | Result date |
| Arenaagent task outcome explicit | Categoryoverall | Rank42 | Rating / score-0.09 | VotesN/A | Observations2.8K | Result date |
| Arenaagent | Categoryoverall | Rank43 | Rating / score-0.10 | VotesN/A | Observations199K | Result date |
| Arenaagent tool hallucination | Categoryoverall | Rank43 | Rating / score-0.01 | VotesN/A | Observations181.6K | Result date |
| Arenaagent praise complaint | Categoryoverall | Rank45 | Rating / score-0.14 | VotesN/A | Observations970 | Result date |
| Arenaagent bash recovery steps | Categoryoverall | Rank46 | Rating / score-0.25 | VotesN/A | Observations10.4K | Result date |
| Arenawebdev | Categorywebdev-react | Rank64 | Rating / score1,356.83 | Votes931 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev-html | Rank65 | Rating / score1,394.34 | Votes159 | ObservationsN/A | Result date |
| Arenawebdev | Categoryoverall | Rank68 | Rating / score1,370.72 | Votes1,404 | ObservationsN/A | Result date |
| Arenawebdev | Categorywebdev | Rank68 | Rating / score1,370.72 | Votes1,404 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryhard prompts english | Rank79 | Rating / score1,454.69 | Votes649 | ObservationsN/A | Result date |
| Arenatext | Categoryhard prompts english | Rank90 | Rating / score1,425.09 | Votes653 | ObservationsN/A | Result date |
| Arenatext factuality | Categorycoding | Rank90 | Rating / score1,459.26 | Votes684 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryindustry business and management and financial operations | Rank92 | Rating / score1,417.81 | Votes491 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryenglish | Rank93 | Rating / score1,426.42 | Votes994 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryindustry software and it services | Rank93 | Rating / score1,449.09 | Votes957 | ObservationsN/A | Result date |
| Arenatext | Categorycoding | Rank95 | Rating / score1,425.04 | Votes684 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryinstruction following | Rank97 | Rating / score1,393.38 | Votes879 | ObservationsN/A | Result date |
| Arenatext | Categoryindustry software and it services | Rank98 | Rating / score1,418.31 | Votes957 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryindustry entertainment and sports and media | Rank98 | Rating / score1,344.53 | Votes640 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryhard prompts | Rank100 | Rating / score1,427.36 | Votes1,623 | ObservationsN/A | Result date |
| Arenatext factuality | Categorylonger query | Rank100 | Rating / score1,410.17 | Votes1,172 | ObservationsN/A | Result date |
| Arenatext style control | Categoryhard prompts english | Rank100 | Rating / score1,437.99 | Votes653 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryindustry writing and literature and language | Rank102 | Rating / score1,369.20 | Votes657 | ObservationsN/A | Result date |
| Arenatext | Categoryexpert | Rank104 | Rating / score1,399.01 | Votes262 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryexclude ties | Rank105 | Rating / score1,379.32 | Votes1,811 | ObservationsN/A | Result date |
| Arenatext factuality | Categoryoverall | Rank105 | Rating / score1,396.98 | Votes2,437 | ObservationsN/A | Result date |
| Arenatext | Categoryenglish | Rank106 | Rating / score1,405.10 | Votes994 | ObservationsN/A | Result date |
| Arenatext factuality | Categorynon english | Rank106 | Rating / score1,376.34 | Votes1,443 | ObservationsN/A | Result date |
| Arenatext style control | Categorycoding | Rank107 | Rating / score1,447.48 | Votes684 | ObservationsN/A | Result date |
Solar Pro 4 Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- $0.30 input, $1.2 output per 1M
- Official provider
- Upstage
- Lowest third-party
- From $0.03 input, $0.12 output per 1M via NanoGPT
- Tracked offerings
- 5
Sort by
Provider | Provider model ID | Region | Input / 1M | Output / 1M | Context | Updated |
|---|
| ProviderNanoGPT | Provider model IDupstage/solar-pro4 | Regionglobal | Input / 1M$0.03 | Output / 1M$0.12 | Context524.3K | Updated |
| ProviderOpenRouter | Provider model IDupstage/solar-pro4 | Regionglobal | Input / 1M$0.03 | Output / 1M$0.12 | Context524.3K | Updated |
| ProviderLLMTR | Provider model IDupstage/solar-pro4 | Regionglobal | Input / 1M$0.03 | Output / 1M$0.12 | Context524.3K | Updated |
| ProviderUpstage | Provider model IDsolar-pro4 | Regionglobal | Input / 1M$0.30 | Output / 1M$1.2 | Context524.3K | Updated |
| ProviderKilo Gateway | Provider model IDupstage/solar-pro4 | Regionglobal | Input / 1M$0.30 | Output / 1M$1.2 | Context524.3K | Updated |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
Solar Pro 4 Runtime Performance
Provider-specific output speed and catalog latency for Solar Pro 4. Runtime does not affect the capability score.
No runtime data
No provider-specific speed or latency record is linked to the default version yet.
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
Solar Pro 4 Specifications
Technical details for the model's default version.
- Version
- Solar Pro 4
- Released
- Aug 6, 2026
- Knowledge cutoff
- Unknown
- Parameters
- N/A
- Context window
- 524.3K
- Max output
- 131.1K
- Inputs
- text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
Solar Pro 4 Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionSolar Pro 4 | Released | LLMBoard56.56 | ParametersN/A | Context524.3K | Max output131.1K | Open weightsNo | LicenseProprietary |
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What is Solar Pro 4?
Key information about Solar Pro 4 and its available data.
Solar Pro 4 is Upstage's proprietary reasoning-focused agentic LLM for text-to-text tasks, supporting English, Korean, and Japanese. It has a ~512K context window, up to 128K output tokens, and adjustable reasoning effort.
Data as of 2026-09-08.
FAQ
Common questions about Solar Pro 4.
When was Solar Pro 4 released?
Solar Pro 4's default version was released on Aug 6, 2026.
How much does Solar Pro 4 cost?
Solar Pro 4's official API price is $0.30 per million input tokens and $1.2 per million output tokens via Upstage. The lowest tracked third-party offer starts at $0.03 input and $0.12 output via NanoGPT.
Who created Solar Pro 4?
Solar Pro 4 was created by Upstage.
What is the context window for Solar Pro 4?
The default version has a 524.3K token context window.
Is Solar Pro 4 open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer Solar Pro 4?
5 provider offerings are linked to the default version.