GPT-5.1-mini
by OpenAI
· GPT 5.1 family · released Nov 12, 2025
Closed
Active
Compact sibling of GPT-5.1 released the same day, offering near-flagship capability at roughly one-fifth the price. Powers high-volume assistant and agent workloads with the same 400K context.
Pricing
Launch price (from Nov 12, 2025)
$0.250 in / $2.00 out per 1M tokens
Current price (since Nov 12, 2025)
$0.250 in / $2.00 out per 1M tokens
| Tier | Effective | In $/M | Out $/M | Cache $/M | Per image | Per second | Source |
|---|---|---|---|---|---|---|---|
| Standard | Nov 12, 2025 – now | $0.250 | $2.00 | - | - | - | - |
Specifications
| Model type | Text LLM |
|---|---|
| Architecture | Unknown |
| Parameters | Not disclosed |
| Context window | 400K tokens |
| Max output | 128K tokens |
| Knowledge cutoff | Sep 30, 2025 |
| License | Proprietary |
| Modalities | Text input Image input Text output |
| Tags | Reasoning Small LM Tool use |
| End of life | Not disclosed |
| Last verified | Not disclosed |