Blended API prices are effectively the same. Claude Opus 5 leads quality index by 11.1 points (93.4 vs 82.3). Claude Opus 5 has the larger context window (1,000,000 vs 200,000 tokens, 5.0×).
Claude Opus 4.5 vs Claude Opus 5
Live catalog fields. Best-in-row is highlighted.
Claude Opus 4.5
Anthropic · anthropic__claude-opus-4.5
Claude Opus 5
Anthropic · anthropic__claude-opus-5
Identity
| Field | anthropic__claude-opus-4.5 | anthropic__claude-opus-5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Slug | anthropic__claude-opus-4.5 | anthropic__claude-opus-5 |
| Status | live | live |
| Open weights | No | No |
| License | — | — |
| HuggingFace | — | — |
Quality
| Field | anthropic__claude-opus-4.5 | anthropic__claude-opus-5 |
|---|---|---|
| Quality index (0–100) | 82.3 | 93.4 |
Cost
| Field | anthropic__claude-opus-4.5 | anthropic__claude-opus-5 |
|---|---|---|
| Input $ / 1M tokens | $5.00 | $5.00 |
| Cached input $ / 1M | $0.50 | $0.50 |
| Output $ / 1M tokens | $25.00 | $25.00 |
Context
| Field | anthropic__claude-opus-4.5 | anthropic__claude-opus-5 |
|---|---|---|
| Max context tokens | 200,000 | 1,000,000 |
| Max output tokens | 64,000 | 128,000 |
Modalities
| Field | anthropic__claude-opus-4.5 | anthropic__claude-opus-5 |
|---|---|---|
| Input | file, image, text | text, image, file |
| Output | text | text |