# Llama 3.1 Nemotron Ultra 253B v1 release · 2025-04-07 · snapshot 2026-10-29

Creator: NVIDIA · 1 effort levels

| Effort level | Input modalities | Intelligence | Total cost | E2E | On the frontier today | ID |
|---|---|---|---|---|---|---|
| Llama 3.1 Nemotron Ultra 253B v1 (Reasoning) | Text | - | - | - | no | `llama-3-1-nemotron-ultra-253b-v1-reasoning` |

Open weights · on the open-weights frontier today: 0 of 1


> Metrics snapshot: 2026-10-29T15:35:49Z. Intelligence index version: v5. Release timeline, frontier age, release impact and shakeup cards are reconstructions using one selected snapshot's metrics, not a record of what was known at release. Scores, benchmark cost and derived value may change when the index methodology changes.