Claude Fable 5.1 vs Claude Opus 5.5
Sample workload: short support reply (~512 output tokens). Open the calculator for your own prompt.
| Field | Claude Fable 5.1 | Claude Opus 5.5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Accuracy | Approx | Approx |
| Input / 1M | $10.00/1M | $4.00/1M |
| Output / 1M | $50.00/1M | $20.00/1M |
| Sample input tokens | 25 | 25 |
| Sample request cost | $0.02585 | $0.01034 |
| Pages | Model page | Model page |
Try your own prompt
Sample costs above use a fixed support-chat prompt. For your text, open the main calculator with either model preselected.
Claude Fable 5.1 in calculator · Claude Opus 5.5 in calculator · Count tokens (Claude Fable 5.1) · Count tokens (Claude Opus 5.5) · All comparisons
How LLM pricing works · Exact vs Approx · Claude Fable 5.1 page · Claude Opus 5.5 page
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Sources and references
Official documentation used for definitions, counting methods, or rate cards. Always confirm critical budgets on the provider page.