References 583% CONFIDENCEOverall confidence: 83%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]90%upstage.ai/blog/en/solar-pro-4upstage.ai· Posted Oct 12, 2026· Starts Aug 11, 2026 ✓· 24% of score
Upstage's[2][3][5] launch post "Solar Pro 4: The Agentic Model That Finishes the Job" is dated August 11, 2026 and its launch promotion runs through September 10; OpenRouter[4] lists the model as released Aug 10, 2026 (14:20 UTC, late evening in Seoul the day before).
- [2]90%Solar Pro 4 - Upstage Model Specs, Pricing & Versionsconsole.upstage.ai· Added Oct 12, 2026· 24% of score
Upstage's[1][3][5] developer docs: flagship agentic model, 512K context, 128K max output, English/Korean/Japanese input and output, February 2026 training cut-off, reasoning mode, $0.30 input, $0.06 cached input and $1.20 output per 1 million tokens.
- [3]75%Solar Mini 4: Built for High-Volume Agent Workloads - Upstageupstage.ai· Published Oct 1, 2026· 23% of score
Upstage's[1][2][5] follow-on small model, with only 3B active parameters per token, launched 1 October 2026 beside Solar Pro 4.
- [4]80%Upstage: Solar Pro 4 - OpenRouteropenrouter.ai· Published Aug 10, 2026· 19% of score
Router listing: released Aug 10, 2026, 524K context, currently 70% off at $0.09 input and $0.36 output per 1 million tokens, and Artificial Analysis scores of 28.2 on its Intelligence Index, 89.1% GPQA Diamond and 57.3% Terminal-Bench 2.1.[1]
- [5]75%Solar Pro 3: Better reasoning at production scale - Upstageupstage.ai· Published Jan 26, 2026· 9% of score
The predecessor's launch post: IFBench 55.78 (a 52% gain over Solar Pro 2) and Arena Hard v2 62.5 at the same serving efficiency, as the baseline Solar Pro 4 is compared against.[1]
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