# Claude 4.1 Opus release · 2025-08-05 · snapshot 2026-10-26

Creator: Anthropic · 2 effort levels

| Effort level | Input modalities | Intelligence | Total cost | E2E | On the frontier today | ID |
|---|---|---|---|---|---|---|
| Claude 4.1 Opus (Non-reasoning) | Text, Image | 18.60 | - | - | no | `claude-4-1-opus` |
| Claude 4.1 Opus (Reasoning) | Text, Image | 22.80 | - | - | no | `claude-4-1-opus-thinking` |


> Metrics snapshot: 2026-10-26T15:24:18Z. Intelligence index version: unknown. 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. Source documentation advertises v4.3.2; API correspondence is unverified.