claude-fable-5-1
claude-fable-5-1 · max, showing backend engineering. Results for all tested efforts are available below.
Backend engineering85
claude-fable-5-1 · max
- Backend engineering
- 85
- Frontend interaction
- 91
- Knowledge & Reasoning
- 95
- Visual aesthetics
- 80
- Maintainability
- 68
- Evaluation time
- 43m 45s
- Reference cost
- $12.77
Backend engineering · Evaluation time & API cost
Backend tested · 9/6/2026Tasks & methodology
Results by reasoning effort
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| Model / effort | Overall | Backend engineering | Frontend interaction | Knowledge & Reasoning | Visual aesthetics | Maintainability | Total eval. time | Total ref. cost | Compare |
|---|---|---|---|---|---|---|---|---|---|
| 82.10 | 73 | 86 | 90 | 80 | 68 | 66m 53s | $8.28 | ||
| 86.85 | 84 | 90 | 95 | 80 | 68 | 55m 35s | $15.94 | ||
| 87.25 | 85 | 91 | 95 | 80 | 68 | 79m 7s | $26.15 |
Score breakdown
- Overall score
- 87.25
- Evaluation time
- 79m 7s
- Reference cost
- $26.15
Service logic, error handling, and test verification.
Contracts and boundaries13 / 20
API contracts, input validation, and boundary behavior.
Retries and failures20 / 20
Error recovery, retry conditions, and failure handling.
CI and adversarial review14 / 20
Verification plans, risk detection, and audit evidence.
Transactions and consistency19 / 20
State transitions, concurrency control, and data consistency.
Caching and regression19 / 20
Cache invalidation, data updates, and regression coverage.
What changes with higher reasoning effort
Compare backend engineering scores, cost, and time across neighboring tested efforts.
xhigh max
- Backend engineering
- +1.0 pts 84.00 → 85.00
- Reference cost
- +$5.66 $7.11 → $12.77
- Evaluation time
- +66.2% 26m 20s → 43m 45s
Data snapshot published · 10/27/2026Scoring & cost notes