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Solar Mini 4

upstage/solar-mini4
  • Upstage
  • Family · Solar Mini 4
  • Released 22 Sep 2026
  • Text → Text
  • Reasoning · adjustable
  • Tools · JSON
Not on OSMEXO yet
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Spec & list price
Context512K
Max output128K
Input / 1M$0.05
Output / 1M$0.204× input
Scores · standing
Intelligence24.1#104/489
Usage
Tokens / day206.0B▲ 9.6% 7d
Usage rank#23
Requests / day1.6M
Tool calls / req0.71
Per request · 30 days
Avg input87.5K5.9× median
Avg output7911.1× median
Cache hit78%1.1× median
Reasoning share61%about median
Tool-call failures6.6%3.5× median

Consumption

83.3B166.7B250.0B3 Oct17 Oct1 Nov
Peak 207.4B 27 OctLow 8.1B 28 SepRank today #23

News & trends

Trending · 14 days

Benchmarks

bar = share of the top score · Benchmark data: Artificial Analysis
Long-context reasoning#15 of 393
83.3%
SciCode#73 of 160
47.6%
Humanity's Last Exam#115 of 465
25.8%
Intelligence index#104 of 489
24.1
Terminal-Bench 4.0#65 of 152
1.0%
Speed · median across 2 providers, latest day
Output speed#198/33458 tok/s1.1× slower than median
Fastest provider75 tok/sbest of 2 providers
First token#2772.34 s2.3× longer than median
First answer token#6519 sthinking included

Best value in its score band

Value
Intelligence Index
20222426$0.02$0.05$0.1Solar Mini 4
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

Interesting facts

  1. 4× the output room of similar models (131.1K against a 32.8K median).
  2. Released 41 days ago.

When to use

Best for

  • Long document question answering
  • Cost-sensitive chat and summarization
  • Tool calling with structured output
  • Tasks needing fine control of reasoning effort

Think twice for

  • Terminal-based coding agents
  • Image or audio input
  • Self-hosting (weights not open)
  • Hardest science questions

Alternatives

other vendors · similar capability

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