Claude Fable 5.1 vs Claude Opus 5: API pricing
As of Oct 14, 2026, Claude Fable 5.1 costs $10.00 input / $50.00 output per million tokens from Anthropic, and Claude Opus 5 costs $5.00 / $25.00 from Anthropic. For 10M input and 2M output tokens a month, Claude Fable 5.1 comes to $200.00 and Claude Opus 5 to $100.00, so Claude Opus 5 is 50% cheaper than Claude Fable 5.1. On LMArena, Claude Fable 5.1 scores higher, 1510 against 1507.
Your monthly cost at the official price
Claude Fable 5.1: $200.00
Claude Opus 5: $100.00cheaper
| Detail |  Claude Fable 5.1 | Claude Opus 5 |
|---|---|---|
| Maker | Anthropic | Anthropic |
| Official input / output | $10.00 / $50.00per million tokens | $5.00 / $25.00per million tokens |
| Cached input | $0.25 | $0.50 |
| Cheapest seller | $10.00 / $50.00Amazon Bedrock Converse | $5.00 / $25.00Amazon Bedrock Converse |
| Sellers | 5 | 7 |
| Context | 1M | 1M |
| LMArena overall | 1510 · #3 | 1507 · #4 |
| LMArena coding | 1529 · #8 | 1533 · #4 |
| Features |
Every seller's price: Claude Fable 5.1 · Claude Opus 5
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- Claude Fable 5 vs Claude Fable 5.1
- Claude Fable 5.1 vs Claude Opus 4.7
- Claude Fable 5.1 vs Muse Spark 1.3
- Claude Fable 5.1 vs MiMo V2.6 Pro
Prices in USD from LiteLLM and models.dev, checked daily; arena scores from LMArena (CC BY 4.0). Confirm on the seller's pricing page before you rely on a number.