Grok 4.5 is 3.8× cheaper per million tokens (blended). Claude Opus 5 has the larger context window (1,000,000 vs 500,000 tokens, 2.0×).
Claude Opus 5 vs Grok 4.5
Live catalog fields. Best-in-row is highlighted.
Claude Opus 5
Anthropic · anthropic__claude-opus-5
Grok 4.5
xAI · x-ai__grok-4.5
Identity
| Field | anthropic__claude-opus-5 | x-ai__grok-4.5 |
|---|---|---|
| Provider | Anthropic | xAI |
| Slug | anthropic__claude-opus-5 | x-ai__grok-4.5 |
| Status | live | live |
| Open weights | No | No |
| License | — | — |
| HuggingFace | — | — |
Quality
| Field | anthropic__claude-opus-5 | x-ai__grok-4.5 |
|---|---|---|
| Quality index (0–100) | 93.4 | — |
Cost
| Field | anthropic__claude-opus-5 | x-ai__grok-4.5 |
|---|---|---|
| Input $ / 1M tokens | $5.00 | $2.00 |
| Cached input $ / 1M | $0.50 | $0.30 |
| Output $ / 1M tokens | $25.00 | $6.00 |
Context
| Field | anthropic__claude-opus-5 | x-ai__grok-4.5 |
|---|---|---|
| Max context tokens | 1,000,000 | 500,000 |
| Max output tokens | 128,000 | 450,000 |
Modalities
| Field | anthropic__claude-opus-5 | x-ai__grok-4.5 |
|---|---|---|
| Input | text, image, file | text, image, file |
| Output | text | text |