Directory · Model comparison
Claude Fable 5 vs Claude Opus 4.8
Side-by-side API economics and benchmarks. Per-1M input and output rates, context window, and verified metrics.
Tale of the tape
Head-to-head specs pulled from each model profile.
| Metric | Claude Fable 5 | Claude Opus 4.8 |
|---|---|---|
| Input cost / 1M | $10.00 | $5.00 |
| Output cost / 1M | $50.00 | $25.00 |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| MMLU score | — | — |
Cost verdict
Enter monthly input and output volumes to see total cost savings.
Claude Fable 5
- Input: 1M × $10.00 = $10.00
- Output: 1M × $50.00 = $50.00
- Total
- $60.00
Claude Opus 4.8
- Input: 1M × $5.00 = $5.00
- Output: 1M × $25.00 = $25.00
- Total
- $30.00
Total cost savings
$30.00
Claude Opus 4.8 saves $30.00 per month vs the other model at this volume.
Model routing savings
Uses this page's verified rates. Claude Fable 5 is the premium route (higher combined per-1M cost); Claude Opus 4.8 handles routine traffic.
All premium
Claude Fable 5
$3,000.00
100% of input and output on the premium route
Routed stack
80% → Claude Opus 4.8
20% → Claude Fable 5
$1,800.00
- Routine slice
- $1,200.00
- Premium slice
- $600.00
Monthly savings
$1,200.00
40% lower
Rates pulled from this page's model database entries (claude-fable-5, claude-opus-4-8) — same per-1M input/output figures as Tale of the tape. Production routing needs quality gates and monitoring.
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