Mistral Small 4 vs Upstage Solar Pro 4
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Both cost about the same at a typical 3:1 input/output mix.
- Solar Pro 4 accepts longer prompts: 524K vs 262K tokens.
- Solar Pro 4 is the newer model (released 2026-08-10).
| Mistral Small 4 | Solar Pro 4 | |
|---|---|---|
| Vendor | Mistral | Upstage |
| Released | 2026-03-16 | 2026-08-10 |
| Input / 1M | $0.15 | $0.15 |
| Output / 1M | $0.60 | $0.60 |
| Cached input / 1M | $0.015 | $0.03 |
| Blended / 1M (3:1) | $0.262 | $0.262 |
| Context | 262K | 524K |
| Max output | 210K | 131K |
| Accepts | text, image | text |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 4 | 2 |
| Cheapest provider, output | $0.60 | $0.60 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | 1341 ±254 | not playing |
| Vendor API status | Operational | — |
Cost calculator
Mistral Small 4
$18.00 per month$0.60 per day
Solar Pro 4
$18.00 per month$0.60 per day
At list prices per 1M tokens; prompt caching and batch discounts are not included.
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