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Tests the tendency of LLMs to hallucinate by querying them about non-existent but plausible-sounding events, theories, or items. Ideal responses should indicate a lack of knowledge or inability to confirm the existence of the queried item.
Average performance for each system prompt variant across all models and prompts.
[No System Prompt]
Do not hallucinate.
Average key point coverage, broken down by system prompt variant. Select a tab to view its results.
| Prompts vs. Models | Claude 3.5 Sonnet | Claude 3.7 Sonnet | Claude 3.5 Haiku | Claude Opus 4.1 | Claude Sonnet 4.5 | Claude Sonnet 4 | Deepseek Chat V3.1 | Deepseek R1 | Gemini 2.5 Flash | Gemini 2.5 Pro | Gemma 3 12b It | Llama 3 70b Instruct | Llama 4 Maverick | Meta Llama 3.1 405b Instruct Turbo | Mistral Large 2411 | Mistral Medium 3 | Mistral Nemo | GPT 4.1 Mini | GPT 4.1 Nano | GPT 4.1 | GPT 4o Mini | GPT 4o | GPT 5 | GPT OSS 120b | GPT OSS 20b | O4 Mini | GLM 4.5 | Qwen3 30b A3B Instruct 2507 | Qwen3 32b | Grok 3 | Grok 4 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Score | 4th 85.7% | 6th 84.2% | 3rd 87.0% | 8th 83.7% | 1st 92.3% | 5th 85.2% | 29th 46.3% | 22nd 62.7% | 11th 80.1% | 18th 70.0% | 31st 21.9% | 13th 77.3% | 7th 84.1% | 2nd 87.0% | 16th 70.8% | 26th 52.7% | 30th 29.7% | 17th 70.4% | 19th 65.1% | 14th 77.2% | 28th 47.7% | 10th 81.4% | 12th 77.4% | 24th 55.4% | 27th 49.1% | 23rd 59.3% | 20th 63.4% | 9th 82.9% | 21st 63.0% | 15th 73.0% | 25th 53.9% | |
| 77.8% | 100% | 100% | 100% | 100% | 100% | 100% | 50% | 100% | 90% | 100% | 33% | 100% | 100% | 100% | 100% | 61% | 54% | 100% | 100% | 100% | 17% | 100% | 100% | 39% | 61% | 20% | 75% | 67% | 50% | 26% | 70% | |
| 98.9% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 92% | 100% | 100% | 100% | 92% | 100% | 100% | 92% | 100% | 100% | 100% | 100% | 92% | |
| 75.1% | 100% | 100% | 100% | 100% | 100% | 100% | 33% | 63% | 94% | 92% | 1% | 100% | 100% | 100% | 50% | 1% | 0% | 100% | 100% | 100% | 15% | 100% | 100% | 100% | 53% | 100% | 86% | 100% | 50% | 92% | 0% | |
| 71.1% | 100% | 100% | 100% | 100% | 100% | 100% | 0% | 100% | 100% | 50% | 0% | 75% | 100% | 100% | 100% | 100% | 0% | 100% | 100% | 100% | 19% | 100% | 100% | 50% | 0% | 25% | 76% | 100% | 63% | 0% | 48% | |
| 87.2% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 45% | 75% | 92% | 100% | 96% | 100% | 88% | 100% | 100% | 100% | 100% | 100% | 100% | 1% | 25% | 75% | 25% | 100% | 100% | 100% | 84% | |
| 65.8% | 100% | 100% | 100% | 100% | 100% | 100% | 9% | 75% | 100% | 100% | 0% | 100% | 100% | 100% | 100% | 42% | 27% | 0% | 38% | 100% | 0% | 100% | 100% | 0% | 26% | 18% | 57% | 100% | 0% | 100% | 50% | |
| 74.7% | 100% | 100% | 100% | 100% | 100% | 100% | 20% | 50% | 100% | 65% | 4% | 100% | 100% | 100% | 98% | 9% | 0% | 100% | 39% | 100% | 6% | 100% | 67% | 55% | 100% | 100% | 28% | 100% | 75% | 100% | 100% | |
| 81.8% | 100% | 100% | 100% | 100% | 100% | 100% | 50% | 75% | 31% | 100% | 17% | 100% | 100% | 100% | 92% | 43% | 32% | 69% | 92% | 100% | 100% | 86% | 100% | 82% | 53% | 73% | 100% | 100% | 88% | 100% | 56% | |
| 0.8% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 25% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |
| 89.3% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 94% | 13% | 100% | 100% | 100% | 81% | 100% | 13% | 100% | 100% | 100% | 2% | 66% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |
| 52.2% | 100% | 100% | 100% | 11% | 100% | 100% | 8% | 9% | 100% | 23% | 7% | 100% | 100% | 100% | 11% | 11% | 0% | 14% | 7% | 100% | 9% | 100% | 100% | 14% | 7% | 73% | 7% | 34% | 5% | 100% | 71% | |
| 71.1% | 100% | 100% | 100% | 100% | 100% | 100% | 17% | 48% | 100% | 50% | 17% | 100% | 100% | 100% | 98% | 26% | 9% | 100% | 100% | 100% | 17% | 100% | 100% | 67% | 32% | 5% | 49% | 100% | 50% | 100% | 21% | |
| 48.6% | 88% | 17% | 100% | 100% | 100% | 100% | 17% | 23% | 100% | 50% | 19% | 0% | 100% | 75% | 59% | 17% | 0% | 3% | 3% | 20% | 64% | 94% | 61% | 24% | 0% | 3% | 50% | 100% | 50% | 39% | 31% | |
| 93.0% | 75% | 99% | 99% | 100% | 100% | 100% | 88% | 96% | 100% | 100% | 56% | 100% | 98% | 99% | 100% | 75% | 96% | 100% | 100% | 100% | 95% | 100% | 91% | 100% | 62% | 71% | 100% | 100% | 100% | 100% | 83% | |
| 65.8% | 100% | 100% | 100% | 100% | 100% | 100% | 60% | 50% | 75% | 75% | 17% | 19% | 100% | 84% | 77% | 48% | 17% | 46% | 61% | 40% | 100% | 98% | 36% | 17% | 28% | 27% | 69% | 100% | 37% | 100% | 61% | |
| 87.7% | 100% | 100% | 100% | 100% | 100% | 100% | 4% | 100% | 100% | 75% | 63% | 100% | 100% | 100% | 100% | 20% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 75% | 50% | 84% | 100% | 100% | 100% | 100% | 50% | |
| 52.3% | 92% | 96% | 96% | 45% | 88% | 52% | 25% | 99% | 63% | 62% | 15% | 46% | 31% | 90% | 45% | 74% | 48% | 41% | 42% | 50% | 28% | 33% | 41% | 38% | 38% | 43% | 25% | 86% | 27% | 40% | 25% | |
| 43.0% | 39% | 42% | 93% | 30% | 88% | 39% | 32% | 45% | 52% | 20% | 25% | 49% | 61% | 69% | 34% | 37% | 56% | 33% | 44% | 38% | 45% | 41% | 26% | 37% | 31% | 27% | 25% | 61% | 63% | 30% | 24% | |
| 90.4% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 75% | 100% | 81% | 0% | 100% | 100% | 100% | 100% | 100% | 6% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 40% | |
| 17.0% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | 17% | |
| 94.1% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 9% | 100% | 100% | 100% | 100% | 100% | 9% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |
| 87.2% | 100% | 100% | 100% | 100% | 100% | 100% | 88% | 61% | 100% | 100% | 22% | 100% | 100% | 100% | 100% | 100% | 17% | 100% | 27% | 100% | 4% | 100% | 100% | 100% | 94% | 92% | 100% | 100% | 100% | 100% | 100% | |
| 87.8% | 100% | 100% | 100% | 100% | 100% | 100% | 50% | 42% | 86% | 75% | 45% | 100% | 100% | 100% | 92% | 92% | 62% | 92% | 100% | 83% | 92% | 75% | 100% | 100% | 100% | 92% | 100% | 100% | 63% | 100% | 84% | |
| 20.4% | 12% | 3% | 2% | 75% | 100% | 11% | 25% | 12% | 50% | 13% | 8% | 14% | 31% | 0% | 6% | 11% | 1% | 3% | 6% | 12% | 7% | 0% | 28% | 20% | 20% | 14% | 23% | 25% | 17% | 48% | 40% | |
| 58.7% | 100% | 100% | 100% | 100% | 100% | 100% | 26% | 1% | 19% | 50% | 9% | 100% | 100% | 100% | 25% | 11% | 0% | 100% | 100% | 50% | 69% | 98% | 50% | 37% | 19% | 61% | 50% | 50% | 50% | 46% | 0% | |
| 78.6% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 71% | 86% | 100% | 17% | 100% | 100% | 100% | 100% | 50% | 14% | 100% | 17% | 100% | 9% | 100% | 100% | 92% | 57% | 100% | 59% | 100% | 100% | 50% | 19% | |
| 75.9% | 92% | 100% | 42% | 83% | 100% | 83% | 33% | 83% | 100% | 100% | 33% | 92% | 42% | 92% | 33% | 83% | 38% | 83% | 75% | 75% | 75% | 92% | 83% | 33% | 55% | 92% | 92% | 100% | 100% | 83% | 92% |