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Get Started Free →LLM evaluation framework and registry (OpenAI Evals). Framework for evaluating LLMs and LLM-based systems with a registry of community-contributed eval templates. Supports model-graded evals, classification, simple completion matching, and custom completion functions. Use for systematic LLM quality testing, regression detection, and prompt engineering validation.
.claude/skills/mkurman-openai-evals/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | -21% | 0% |
| case-06 | ✗→✓ | ▲ Improved | 20% | 0% |
| case-09 | ✗→✓ | ▲ Improved | 39% | 0% |
| case-10 | ✗→✓ | ▲ Improved | -22% | 0% |
| case-08 | ✓→✓ | = Same ✓ | -44% | 0% |
|------|--------| | mmlu | Match | Knowledge (57 subjects) | | hellaswag | Match | Commonsense reasoning | | truthfulqa | Model-graded | Truthfulness | | gsm8k | Match | Math reasoning | | humaneval | Custom | Code generation | | ifeval | Model-graded | Instruction following | | bbq | Model-graded | Bias detection | | factuality | Model-graded | Factual accuracy | | translation | Model-graded | Translation quality |
Browse full registry: evals/registry/evals/
python# CI/CD eval pipeline def run_eval_suite(model_name, eval_names): results = {} for eval_name in eval_names: cmd = f"oaieval {model_name} {eval_name} --max_samples 200" result = subprocess.run(cmd, shell=True, capture_output=True) results[eval_name] = parse_accuracy(result.stdout) return results # Regression test previous = {"mmlu": 0.86, "gsm8k": 0.92, "hellaswag": 0.85} current = run_eval_suite("my-finetuned-model", ["mmlu", "gsm8k", "hellaswag"]) for name, score in current.items(): if score < previous[name] - 0.02: # 2% regression threshold alert(f"Regression in {name}: {previous[name]:.2f} → {score:.2f}")
git lfs fetch --all is required before running community evals| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-08 | pass→pass | 10,284 | 6,253 | -39% | 1 | 1 | 0% | 1,924 | 1,084 | -44% | 0 | 0 | — |
case-01 | fail→pass | 15,808 | 8,128 | -49% | 1 | 1 | 0% | 2,684 | 2,131 | -21% | 0 | 0 | — |
case-02 | fail→fail | 20,846 | 17,218 | -17% | 1 | 1 | 0% | 4,019 | 4,092 | +2% | 0 | 0 | — |
case-03 | pass→pass | 12,689 | 8,297 | -35% | 1 | 1 | 0% | 2,070 | 2,052 | -1% | 0 | 0 | — |
case-04 | pass→pass | 7,293 | 3,862 | -47% | 1 | 1 | 0% | 1,333 | 1,326 | -1% | 0 | 0 | — |
case-05 | pass→pass | 11,724 | 8,320 | -29% | 1 | 1 | 0% | 1,856 | 1,989 | +7% | 0 | 0 | — |
case-06 | fail→pass | 7,149 | 4,075 | -43% | 1 | 1 | 0% | 1,103 | 1,322 | +20% | 0 | 0 | — |
case-07 | pass→pass | 8,854 | 4,270 | -52% | 1 | 1 | 0% | 1,309 | 1,318 | +1% | 0 | 0 | — |
case-09 | fail→pass | 4,833 | 2,953 | -39% | 1 | 1 | 0% | 771 | 1,070 | +39% | 0 | 0 | — |
case-10 | fail→pass | 9,273 | 2,940 | -68% | 1 | 1 | 0% | 1,446 | 1,123 | -22% | 0 | 0 | — |
case-11 | pass→pass | 8,043 | 2,817 | -65% | 1 | 1 | 0% | 1,280 | 1,104 | -14% | 0 | 0 | — |
case-12 | pass→pass | 13,930 | 11,367 | -18% | 1 | 1 | 0% | 2,663 | 2,889 | +8% | 0 | 0 | — |
case-13 | pass→pass | 8,024 | 3,776 | -53% | 1 | 1 | 0% | 1,306 | 1,292 | -1% | 0 | 0 | — |
case-14 | pass→pass | 12,287 | 14,729 | +20% | 1 | 1 | 0% | 1,911 | 3,106 | +63% | 0 | 0 | — |
case-15 | pass→pass | 13,531 | 9,888 | -27% | 1 | 1 | 0% | 2,215 | 2,396 | +8% | 0 | 0 | — |
case-16 | pass→pass | 5,024 | 2,390 | -52% | 1 | 1 | 0% | 830 | 1,098 | +32% | 0 | 0 | — |
case-17 | pass→pass | 2,852 | 2,637 | -8% | 1 | 1 | 0% | 447 | 1,047 | +134% | 0 | 0 | — |
case-18 | pass→pass | 14,343 | 11,984 | -16% | 1 | 1 | 0% | 2,263 | 2,708 | +20% | 0 | 0 | — |
case-19 | pass→pass | 11,772 | 6,239 | -47% | 1 | 1 | 0% | 1,906 | 1,750 | -8% | 0 | 0 | — |
case-20 | pass→pass | 5,209 | 4,583 | -12% | 1 | 1 | 0% | 889 | 1,432 | +61% | 0 | 0 | — |
case-21 | pass→pass | 10,578 | 10,454 | -1% | 1 | 1 | 0% | 2,056 | 2,755 | +34% | 0 | 0 | — |
case-22 | pass→pass | 2,657 | 2,577 | -3% | 1 | 1 | 0% | 447 | 1,141 | +155% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted. The headline lift of +18 percentage points is the difference between those two pass rates over the 22 comparable cases.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.