Model comparison
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Differences vs. gpt-5.6-terra · high
Score, cost & time differences
Current baseline · gpt-5.6-terra · high
65Backend engineering
Compared with gpt-5.6-terra · high
- gpt-5.6-luna · max
Backend engineering: tiedReference cost $0.17 ($0.23 less)Evaluation time 48m 26s (30m 39s more)
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | gpt-5.6-terra · high | gpt-5.6-luna · max |
|---|---|---|
| Backend engineering | gpt-5.6-terrahigh 65 | gpt-5.6-lunamax 65Tied |
| Overall | gpt-5.6-terrahigh 54.80 | gpt-5.6-lunamax 52.30−2.5 pts |
| Frontend interaction | gpt-5.6-terrahigh 67 | gpt-5.6-lunamax 78+11 pts |
| Knowledge & Reasoning | gpt-5.6-terrahigh 45 | gpt-5.6-lunamax 25−20 pts |
| Visual aesthetics | gpt-5.6-terrahigh 53 | gpt-5.6-lunamax 59+6 pts |
| Maintainability | gpt-5.6-terrahigh 47 | gpt-5.6-lunamax 61+14 pts |
Backend engineering evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Backend engineering evaluation| Metric | gpt-5.6-terra · high | gpt-5.6-luna · max |
|---|---|---|
| Reference cost | gpt-5.6-terrahigh $0.40 | gpt-5.6-lunamax $0.17−$0.23 |
| Evaluation time | gpt-5.6-terrahigh 17m 47s | gpt-5.6-lunamax 48m 26s+172.4% |
Capability profiles
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Behind each score
Expand to inspect each subaxis.
Backend engineeringSubscores
| Scoring dimension | gpt-5.6-terrahigh | gpt-5.6-lunamax |
|---|---|---|
| Contracts and boundaries | 13 / 20 | 7 / 20 |
| Retries and failures | 14 / 20 | 15 / 20 |
| CI and adversarial review | 9 / 20 | 13 / 20 |
| Transactions and consistency | 14 / 20 | 16 / 20 |
| Caching and regression | 15 / 20 | 14 / 20 |
Frontend interactionSubscores
| Scoring dimension | gpt-5.6-terrahigh | gpt-5.6-lunamax |
|---|---|---|
| Layout and adaptation | 15 / 20 | 18 / 20 |
| Interaction behavior | 18 / 20 | 19 / 20 |
| State continuity | 12 / 20 | 13 / 20 |
| Accessibility and feedback | 7 / 15 | 13 / 15 |
| State validation and regression | 15 / 25 | 15 / 25 |
Knowledge & ReasoningSubscores
| Scoring dimension | gpt-5.6-terrahigh | gpt-5.6-lunamax |
|---|---|---|
| Mathematical reasoning | 5 / 15 | 10 / 15 |
| Computer science & AI | 5 / 15 | 0 / 15 |
| Science and engineering | 0 / 10 | 0 / 10 |
| Life sciences and medicine | 15 / 20 | 0 / 20 |
| Humanities and general knowledge | 20 / 40 | 15 / 40 |
Visual aestheticsSubscores
| Scoring dimension | gpt-5.6-terrahigh | gpt-5.6-lunamax |
|---|---|---|
| Composition | 19 / 20 | 17 / 20 |
| Spacing and alignment | 14 / 20 | 17 / 20 |
| Typography and expression | 16 / 20 | 15 / 20 |
| Color and surfaces | 19 / 20 | 19 / 20 |
| Control styling | 13 / 20 | 16 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | gpt-5.6-terrahigh | gpt-5.6-lunamax |
|---|---|---|
| Semantic clarity | 15 / 20 | 16 / 20 |
| Control-flow organization | 15 / 20 | 20 / 20 |
| Locality of changes | 15 / 20 | 15 / 20 |
| State and lifecycle | 17 / 20 | 18 / 20 |
| Implementation economy | 16 / 20 | 16 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.