Is claude-opus-4.8-high good at Structured Output?
claude-opus-4.8-high ranks #20 of 43 for Structured Output — strong. The top pick for this task is qwen3.7-max-low.
#20 / 43
Rank for this task
88.9
Score
$0.0222
Cost / run
claude-opus-4.8-high on each Structured Output sub-task
| Missing & Ambiguous Data | 95.0/100 | #20 |
| Transformation | 94.3/100 | #16 |
| Schema Adherence | 94.3/100 | #19 |
| Noisy Structured Output Test | 84.6/100 | #23 |
| Extraction | 79.3/100 | #30 |
Real examples, graded
WeakInvoice line items 6/100
“The model failed to output strict JSON by including markdown fences and trailing commentary.”
Frequently asked
Is claude-opus-4.8-high good at Structured Output?
claude-opus-4.8-high ranks #20 of 43 models we tested for Structured Output, scoring strong.
What is claude-opus-4.8-high's strongest Structured Output skill?
Its best sub-task here is Missing & Ambiguous Data.
This page is Spring Prompt, running
We just did this for every model. Do it for your prompt.
The rankings above come from running real tasks through real models and scoring every output. Spring Prompt is that same engine — pointed at your prompt, your test cases, and your definition of good.
- Generate test cases from your prompt — no eval set required to start.
- Compare models side by side with quality, cost and latency in one matrix.
- Optimise the winner until the scores say it's ready to ship.
Experiment · Cold outreach email
Prompt × model results
12 test cases · 3 evalsClaude Opus
GPT-5
Gemini
v1
7.1
6.8
7.4
v2
8.3
7.9
8.0
v3
9.2
★
8.6
8.4
Best combo: v3 × Claude Opus
9.2 quality · $0.004/run · 1.8s