AI model quality improved in 2025, but hallucinations still happen often enough to impact legal, medical, technical, and financial workflows. Research across retrieval, long-context, and citation tasks shows that hallucination rates vary significantly by prompt type and guardrails.
Approximate hallucination rates from selected 2025 evaluations
(Lower is better. These ranges represent consolidated public benchmark reporting and task-specific studies, not a single benchmark.)
| Task Type | Rate (Approx.) | Visual |
|---|---|---|
| Grounded RAG Q&A | 6% – 12% | ▇▇ |
| Citation-Constrained Summaries | 8% – 15% | ▇▇▇ |
| General Open-Ended Answers | 12% – 22% | ▇▇▇▇ |
| Long-Context Synthesis | 18% – 30% | ▇▇▇▇▇ |
Takeaway
AI is strongest when grounded to trusted sources. The best production workflows in 2026 combine retrieval, source citation, and human review before publishing.