Mistral AI vs 
Upstage
Verdict
- Upstage's flagship leads: Solar Pro 4 at 54.7 vs Mistral Medium 3.5 at 49.0.
- Upstage has the better model in 3 of 4 price bands.
- Mistral AI's fastest ranked model (Ministral 3 3B, 202 tok/s) beats Upstage's (Solar Pro 3, 152 tok/s).
- Mistral AI publishes more open-weights models (38 vs 1).
- Mistral AI ships more often: one model every 46 days against every 191.
Best model per price band
Each provider’s highest-index model below the price ceiling. Purple marks the winner of the band.
| Price band | Mistral AI | Upstage |
|---|---|---|
| Under $0.50/M | Mistral Small 4 44.8$0.262/M | Solar Pro 3 42.4$0.262/M |
| Under $2/M | Mistral Large 3 45.0$0.750/M | Solar Pro 4 54.7$0.525/M |
| Under $10/M | Mistral Medium 3.5 49.0$3.00/M | Solar Pro 4 54.7$0.525/M |
| Any price | Mistral Medium 3.5 49.0$3.00/M | Solar Pro 4 54.7$0.525/M |
Line-up
| Metric | Mistral AI | Upstage |
|---|---|---|
| Flagship index | 49.0 | 54.7 |
| Ranked models | 24 | 2 |
| Open-weights models | 38 | 1 |
| Cheapest ranked, $/M | $0.100 | $0.262 |
| Fastest ranked, tok/s | 202 | 152 |
| Release cadence, days | 46 | 191 |
| Last release | 13 Jun 2026 | 6 Aug 2026 |
| Next expected | 10 Jul 2026 – 16 Aug 2026 | 28 Nov 2026 – 30 Apr 2027 |
Data as of 13 Sept 2026. See Mistral AI and Upstage in full.