structured output benchmark
Internal API instruction following (hard)
Internal API instruction following (hard) benchmark - specific documentation not found in official sources
Updated Aug 11, 2026
Models7
Model coverage7
MetricScore
EvidenceB
Internal API instruction following (hard) Ranking
Higher score ranks better on this benchmark.
| 1 | OP | 64.0% | 100.0% | 7 | C | |
| 2 | OP | 54.0% | 83.3% | 7 | C | |
| 3 | OP | 50.0% | 66.7% | 7 | C | |
| 4 | OP | 49.1% | 50.0% | 7 | C | |
| 5 | OP | 45.1% | 33.3% | 7 | C | |
| 6 | OP | 31.6% | 16.7% | 7 | C | |
| 7 | OP | 29.2% | 0.0% | 7 | C |
Internal API instruction following (hard) Score Distribution
A closer view of the leading scores on this benchmark.
Internal API instruction following (hard) Highlights
The leading models and scores on this benchmark.
What is Internal API instruction following (hard)?
What Internal API instruction following (hard) measures and how its scores work.
Internal API instruction following (hard) benchmark - specific documentation not found in official sources
Scores are shown in ratio. This benchmark is not independently verified and has an evidence level of B.
- Family
- Internal API instruction following (hard)
- Modality
- text
- Primary category
- structured output
- Score direction
- higher
- LLMBoard eligible
- Yes
- Evaluation key
- internal-api-instruction-following-(hard)|llm-stats-current
Benchmark scores retain their original unit. Overall score eligibility is shown separately.
FAQ
Common questions about Internal API instruction following (hard).
Which model scores highest on Internal API instruction following (hard)?
GPT-5 is currently ranked first with 64.0%.
What does Internal API instruction following (hard) measure?
Internal API instruction following (hard) benchmark - specific documentation not found in official sources
Is a higher score better?
Yes. Higher values rank better for this benchmark.
How many models are compared?
7 model results are currently shown.
Does this benchmark affect the overall score?
Yes. This benchmark can contribute to the current LLMBoard capability score.