Model comparison
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Differences vs. gpt-5.6-terra · xhigh
Score, cost & time differences
Current baseline · gpt-5.6-terra · xhigh
72Frontend interaction
Compared with gpt-5.6-terra · xhigh
- k2.8 · high
Frontend interaction: tiedReference cost $0.25 ($0.076 less)Evaluation time 23m 59s (15m 3s 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 · xhigh | k2.8 · high |
|---|---|---|
| Frontend interaction | gpt-5.6-terraxhigh 72 | k2.8high 72Tied |
| Overall | gpt-5.6-terraxhigh 54.50 | k2.8high 63.55+9.05 pts |
| Backend engineering | gpt-5.6-terraxhigh 67 | k2.8high 54−13 pts |
| Knowledge & Reasoning | gpt-5.6-terraxhigh 35 | k2.8high 70+35 pts |
| Visual aesthetics | gpt-5.6-terraxhigh 57 | k2.8high 57Tied |
| Maintainability | gpt-5.6-terraxhigh 59 | k2.8high 53−6 pts |
Frontend interaction evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Frontend interaction evaluation| Metric | gpt-5.6-terra · xhigh | k2.8 · high |
|---|---|---|
| Reference cost | gpt-5.6-terraxhigh $0.33 | k2.8high $0.25−$0.076 |
| Evaluation time | gpt-5.6-terraxhigh 8m 56s | k2.8high 23m 59s+168.3% |
Capability profiles
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Behind each score
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Backend engineeringSubscores
| Scoring dimension | gpt-5.6-terraxhigh | k2.8high |
|---|---|---|
| Contracts and boundaries | 10 / 20 | 9 / 20 |
| Retries and failures | 17 / 20 | 15 / 20 |
| CI and adversarial review | 12 / 20 | 14 / 20 |
| Transactions and consistency | 14 / 20 | 9 / 20 |
| Caching and regression | 14 / 20 | 7 / 20 |
Frontend interactionSubscores
| Scoring dimension | gpt-5.6-terraxhigh | k2.8high |
|---|---|---|
| Layout and adaptation | 18 / 20 | 16 / 20 |
| Interaction behavior | 19 / 20 | 18 / 20 |
| State continuity | 10 / 20 | 15 / 20 |
| Accessibility and feedback | 10 / 15 | 10 / 15 |
| State validation and regression | 15 / 25 | 13 / 25 |
Knowledge & ReasoningSubscores
| Scoring dimension | gpt-5.6-terraxhigh | k2.8high |
|---|---|---|
| Mathematical reasoning | 5 / 15 | 5 / 15 |
| Computer science & AI | 5 / 15 | 5 / 15 |
| Science and engineering | 0 / 10 | 5 / 10 |
| Life sciences and medicine | 10 / 20 | 20 / 20 |
| Humanities and general knowledge | 15 / 40 | 35 / 40 |
Visual aestheticsSubscores
| Scoring dimension | gpt-5.6-terraxhigh | k2.8high |
|---|---|---|
| Composition | 18 / 20 | 16 / 20 |
| Spacing and alignment | 16 / 20 | 17 / 20 |
| Typography and expression | 16 / 20 | 16 / 20 |
| Color and surfaces | 19 / 20 | 19 / 20 |
| Control styling | 14 / 20 | 15 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | gpt-5.6-terraxhigh | k2.8high |
|---|---|---|
| Semantic clarity | 15 / 20 | 14 / 20 |
| Control-flow organization | 20 / 20 | 19 / 20 |
| Locality of changes | 15 / 20 | 15 / 20 |
| State and lifecycle | 17 / 20 | 17 / 20 |
| Implementation economy | 17 / 20 | 16 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.