Solar Pro 4 Intelligence, Performance & Price Analysis
Model summary
Solar Pro 4 is amongst the leading models in intelligence, but somewhat expensive when comparing to other models of similar price. It's also faster than average, however very verbose. The model supports text input, outputs text, and has a 512k tokens context window with knowledge up to February 2026.
Solar Pro 4 scores 27 on the Artificial Analysis Intelligence Index, placing it well above average among comparable models (median: 13). When evaluating the Intelligence Index, it generated 340M tokens, which is very verbose in comparison to the median of 100M.
Pricing for Solar Pro 4 is $0.30 per 1M input tokens (somewhat expensive, median: $0.24) and $1.20 per 1M output tokens (somewhat expensive, median: $0.87). On average, it costs $0.71 per task to evaluate Solar Pro 4 on the Intelligence Index.
At 119 tokens per second, Solar Pro 4 is faster than average (114).
| Reasoning | Yes This page shows the reasoning version of this model. A non-reasoning variant may also exist. |
|---|---|
| Input modality | Supports: text |
| Output modality | Supports: text |
| Knowledge cutoff | Feb 28, 2026 |
| Context window | 512k ~768 A4 pages of size 12 Arial font |
Metrics are compared against models of the same class:
- Non-reasoning models → compared only with other non-reasoning models
- Reasoning models → compared across both reasoning and non-reasoning
- Open weights models → compared only with other open weights models of the same size class:
- Tiny: ≤4B parameters
- Small: 4B–40B parameters
- Medium: 40B–150B parameters
- Large: >150B parameters
- Proprietary models → compared across proprietary and open weights models of the same price range, using a blended 3:1 input/output price ratio:
- <$0.15 per 1M tokens
- $0.15–$1 per 1M tokens
- >$1 per 1M tokens
Intelligence
Artificial Analysis Intelligence Index
Artificial Analysis Intelligence Index by Open Weights / Proprietary
Intelligence Index vs. Cost per Task
Measures the performance of models on specific capabilities and industries
Artificial Analysis Finance & Accounting Index
Evaluations
Agentic knowledge work, (Elo-500)/2000
Knowledge
1 - hallucination rate
Agentic SaaS workflows
Agentic real-world work tasks, (Elo-500)/2000
Reasoning & knowledge
Professional document reasoning, All-pass
Agentic coding & terminal use
Long context reasoning
Coding
Physics reasoning
Agentic scientific research workflows in a terminal
Agentic software engineering in open-source repositories
Quantitative analysis on spreadsheets & documents
Legal agentic work, Hallucination-Gated All-Pass Rate
Agentic business operations
Agentic interactive 3D experiences, (Elo-500)/2000
Kubernetes incident root-cause analysis
Medical long context reasoning
Visual reasoning
AA-Briefcase v1.1Updated
AA-Briefcase Elo
AA-Omniscience
AA-Omniscience Index
AA-PersonalityBenchNew
Intelligence Index Comparisons
Intelligence Index vs. Cost per Task
Token Use
Output Tokens per Intelligence Index Task
Cost
Cost per Intelligence Index Task
Cost to Run Artificial Analysis Intelligence Index
Pricing: Cache Hit, Input, and Output
Context Window
Context Window
Speed
Measured by Output Speed (tokens per second)
Output Speed
Time per Intelligence Index Task
Latency
Measured by Time (seconds) to First Token
Latency: Time To First Answer Token
End-to-End Response Time
Seconds to output 500 tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed
End-to-End Response Time
Frequently Asked Questions
Common questions about Solar Pro 4
Solar Pro 4 was released on August 6, 2026.
Solar Pro 4 was created by Upstage.
Solar Pro 4 scores 27 on the Artificial Analysis Intelligence Index, placing it well above average among other models in a similar price tier (median: 13).
Solar Pro 4 generates output at 118.8 tokens per second (based on Upstage's API), which is above average compared to other models in a similar price tier (median: 114.2 t/s).
Solar Pro 4 has a time to first token (TTFT) of 1.70s (based on Upstage's API), which is better than average compared to other models in a similar price tier (median: 1.70s).
Solar Pro 4 costs $0.30 per 1M input tokens (somewhat higher than average, median: $0.24) and $1.20 per 1M output tokens (somewhat higher than average, median: $0.87), based on Upstage's API.
Solar Pro 4 costs $0.30 per 1M input tokens and $1.20 per 1M output tokens (based on Upstage's API). For a blended rate (7:2:1 cache hit/input/output ratio), this is $0.22 per 1M tokens. Pricing may vary by provider. Compare provider pricing
When evaluated on the Intelligence Index, Solar Pro 4 generated 340M output tokens, which is at the higher end compared to other models in a similar price tier (median: 100M).
Yes, Solar Pro 4 is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
Solar Pro 4 supports text input.
Solar Pro 4 supports text output.
No, Solar Pro 4 does not support image input. It can only process text.
No, Solar Pro 4 is not multimodal. It only supports text input.
Solar Pro 4 has a context window of 510k tokens. This determines how much text and conversation history the model can process in a single request.
No, Solar Pro 4 is proprietary. The model weights are not publicly available.
Solar Pro 4 is a proprietary model and Upstage has not disclosed the model size or parameter count.
Solar Pro 4 achieves a score of 27 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Solar Pro 4 has a knowledge cutoff of February 2026. The model's training data includes information up to this date.
Yes, Solar Pro 4 is available via API through 1 provider. Compare API providers
Solar Pro 4 is available through 1 API provider. Compare providers