Solar Mini 4
Model idupstage/solar-mini4
Price$0.05 in, $0.20 out per 1M tokens
Checked10 October 2026
No published training cutoff
At least221events since its release on 1 October 2026
10 historic, 35 major. 9 days of news.
Upstage doesn’t publish a training cutoff, so we count from its release date. The real gap is larger.
How to call it
Where to use Solar Mini 4, with its model id.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenRouter | upstage/solar-mini4 |
openrouter.ai |
Pricing
| Input | $0.05 per 1M tokens |
|---|---|
| Cached input | $0.005 per 1M tokens |
| Output | $0.20 per 1M tokens |
As published: “per 1M tokens (USD)”.
Source: openrouter.ai, checked 10 October 2026.
Specs
- Input
- Text
- Output
- Text
- Context window
- 524,288 tokens
- Max output
- 131,072 tokens
- Open weights
- No
- Licence
- Proprietary
- Training cutoff
- Not published
- Released
- 1 October 2026
- Status
- Current
- Type
- Language model
What stands out
What its maker marketed at launch, and what people found later, each with its source.
3B-active MoE for high-volume agent work
35B-parameter mixture-of-experts with ~3B active parameters and a 524K context; scores 24 on the Artificial Analysis Intelligence Index, among the best at its active size; runs on a single GPU after quantization (Upstage via Digital Today).
Notes
South Korea’s Upstage announced Solar Mini 4 on Oct 1, 2026 (OpenRouter listing dated Sept 23). CEO Kim Seong-hun positions ‘Pro’ (Solar Pro 4, Aug 2026) for complex agent tasks and ‘Mini’ for large-scale business automation. Open-weight status not stated (no Hugging Face id on OpenRouter).
Not yet checked against an official source: Upstage console model id not verified.