claude-opus-5
claude-opus-5 · xhigh, showing backend engineering. Results for all tested efforts are available below.
Backend engineering74
claude-opus-5 · xhigh
- Backend engineering
- 74
- Frontend interaction
- 87
- Knowledge & Reasoning
- 85
- Visual aesthetics
- 66
- Maintainability
- 59
- Evaluation time
- 18m 42s
- Reference cost
- $2.01
Backend engineering · Evaluation time & API cost
Backend tested · 9/10/2026Tasks & 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 |
|---|---|---|---|---|---|---|---|---|---|
| 76.95 | 68 | 85 | 90 | 61 | 57 | 66m 37s | $4.06 | ||
| 77.75 | 74 | 87 | 85 | 66 | 59 | 80m 26s | $5.68 | ||
| 81.70 | 70 | 87 | 95 | 73 | 61 | 92m 12s | $7.99 |
Score breakdown
- Overall score
- 77.75
- Evaluation time
- 80m 26s
- Reference cost
- $5.68
Service logic, error handling, and test verification.
Contracts and boundaries16 / 20
API contracts, input validation, and boundary behavior.
Retries and failures15 / 20
Error recovery, retry conditions, and failure handling.
CI and adversarial review12 / 20
Verification plans, risk detection, and audit evidence.
Transactions and consistency15 / 20
State transitions, concurrency control, and data consistency.
Caching and regression16 / 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.
high xhigh
- Backend engineering
- +6.0 pts 68.00 → 74.00
- Reference cost
- +$0.82 $1.19 → $2.01
- Evaluation time
- +51.0% 12m 23s → 18m 42s
Data snapshot published · 10/27/2026Scoring & cost notes