Solar Pro 4
upstage/solar-pro4- Upstage
- Family · Solar Pro 4
- Released 6 Aug 2026
- Text → Text
- Reasoning · adjustable
- Tools · JSON
Not on OSMEXO yet
Spec & list price
Context512K
Max output128K
Input / 1M$0.15
Output / 1M$0.604× input
Scores · standing
Intelligence26.6#81/489
Usage
Tokens / day32.9B▼ 18% 7d
Usage rank#60
Requests / day384.3K
Tool calls / req0.44
Per request · 30 days
Avg input61.8K4.1× median
Avg output3990.6× median
Cache hit92%1.3× median
Reasoning share17%0.3× median
Tool-call failures1.2%0.6× median
Consumption
Peak 212.8B 26 SepLow 19.9B 2 OctRank today #60
Benchmarks
bar = share of the top score · Benchmark data: Artificial AnalysisSpeed · median across 2 providers, latest day
Output speed#134/33378 tok/s1.2× faster than median
Fastest provider91 tok/sbest of 2 providers
First token#1851.21 s1.2× longer than median
First answer token#7323 sthinking included
#5 cheapest of 24 with a similar score
Value
Intelligence Index
Blended price per 1M tokens (log)
Technical details
- Reasoning
- on · medium
- Tokenizer
- Other
- Moderation
- none
Reasoning effort
- max
- xhigh
- high
- medium · default
- low
- minimal
- none
Request parameters 13
- tools
- tool_choice
- parallel_tool_calls
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- temperature
- top_p
+3 more
- max_tokens
- frequency_penalty
- presence_penalty
When to use
Best for
- Graduate-level science question answering
- Long document reasoning
- Tool-calling agents with structured output
- Terminal-style coding tasks
Think twice for
- Image or audio input
- Self-hosting (weights not open)
- Highest-end agentic work
- Cheapest high-volume chat
Alternatives
other vendors · similar capability- 25.3
- 29.2
- 26.5
- 22.2
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