k2.8
k2.8 · high, showing backend engineering. Results for all tested efforts are available below.
Backend engineering54
k2.8 · high
- Backend engineering
- 54
- Frontend interaction
- 72
- Knowledge & Reasoning
- 70
- Visual aesthetics
- 57
- Maintainability
- 53
- Evaluation time
- 22m 14s
- Reference cost
- $0.21
Backend engineering · Evaluation time & API cost
Backend tested · 9/11/2026Tasks & 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 |
|---|---|---|---|---|---|---|---|---|---|
| 63.55 | 54 | 72 | 70 | 57 | 53 | 70m 58s | $0.66 | ||
| — | — | — | 70 | — | — | 53m 24s | $0.59 |
Score breakdown
- Overall score
- 63.55
- Evaluation time
- 70m 58s
- Reference cost
- $0.66
Service logic, error handling, and test verification.
Contracts and boundaries9 / 20
API contracts, input validation, and boundary behavior.
Retries and failures15 / 20
Error recovery, retry conditions, and failure handling.
CI and adversarial review14 / 20
Verification plans, risk detection, and audit evidence.
Transactions and consistency9 / 20
State transitions, concurrency control, and data consistency.
Caching and regression7 / 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 max
- Backend engineering
- — 54.00 → —
- Reference cost
- — $0.21 → —
- Evaluation time
- — 22m 14s → —
Data snapshot published · 10/27/2026Scoring & cost notes