Observed Signal · Jun 28, 2026 · Technical Guidance · Source: t3n · Impact: 2/5 · Sentiment: Neutral
System Prompts Reduce ChatGPT Hallucinations
The t3n article explains that large language models like ChatGPT, Claude and others can produce fabricated facts, sources and numbers (hallucinations). It presents an eight-point system-prompt template—published via the t3n MeisterPrompter podcast and shownotes—that aims to make models admit uncertainty, avoid inventing facts, and label assumptions. The piece explains where to store such a system prompt in popular chat UIs (ChatGPT: Individual Instructions / Personalization; Claude: Instructions under Profile; Google Gemini: Personal Context -> 'Your instructions for Gemini'). The article notes the template helps reduce but cannot fully eliminate hallucinations. The story was originally published on 2026-06-10 and updated; the page metadata indicates publication on 2026-06-28.
Practical guidance that helps reduce LLM hallucinations—useful for teams deploying conversational interfaces—but it is not a platform policy change or industry-shifting technical release.
Track TargetVideo Signals & Market Shifts in Real-Time
Polaris7 autonomous intelligence agents track regulatory filings, primary sources, executive changes, and deal flow 24/7. Create your free Explorer workspace to monitor these entities.
Key Takeaways & Evidence Grounding
- t3n published and updated an article describing an eight-point system-prompt template to reduce LLM hallucinations.
- The template aims to force the model to explicitly admit uncertainty, avoid inventing facts, and mark assumptions.
- t3n says the system prompt can be stored centrally in chatbot settings: ChatGPT via 'Individual Instructions', Claude via 'Instructions' in Profile, and Google Gemini via 'Personal Context'.
- The article text states that ChatGPT, Claude and other AI tools can hallucinate and that prompts can help detect but not fully prevent such errors.
Connected Companies & Entities
5 Entities mapped“The article states: "Here you find external content from TargetVideo GmbH that complement our editorial offering on t3n.de."...”
“The article states: "Here you find external content from Podigee GmbH that complement our editorial offering on t3n.de."...”
“The article observes: "ChatGPT, Claude and other AI tools can hallucinate." (referring to ChatGPT, an OpenAI product)...”
“The article observes: "ChatGPT, Claude and other AI tools can hallucinate." (referring to Claude, an Anthropic product)...”
“The article explains: "To set a system prompt in Google Gemini, you can add it in Settings under 'Personal Context' and then in the field 'Y...”
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
System prompt template reduces AI hallucinations
t3n reports a system-prompt template (published via its MeisterPrompter podcast and newsletter) intended to reduce hallucinations from chat-based AI like ChatGPT, Claude and Google Gemini. The eight-point prompt instructs models to explicitly state uncertainty, refuse to invent facts, cite when assumptions are used, and answer “I don’t know” when information is not verifiable. The article explains where to set system-level instructions in each service (ChatGPT, Claude, Gemini), links to the podcast shownotes for the full template, and notes that prompts help detect errors but cannot fully eliminate hallucinations. The piece also discloses that the t3n article was produced with an internal editorial AI tool.
System Prompt Reduces AI Hallucinations
t3n published guidance and a reusable system-prompt template (via its t3n MeisterPrompter podcast and newsletter) aimed at reducing hallucinations from AI chat tools. The prompt instructs models to explicitly declare uncertainty (e.g., say “I don't know”), avoid inventing facts, sources or numbers, and label assumptions. The article explains where to set system prompts in common assistants (ChatGPT, Claude, Google Gemini) and notes that while a system prompt helps detect and reduce errors, it cannot fully prevent hallucinations. The full prompt text is available in the podcast show notes and related newsletter materials.
Prompt to Transfer ChatGPT Settings to Claude
t3n reports a prompt-based method to migrate personalized settings and preferences when switching between AI chatbots (e.g., ChatGPT to Claude). Claude provides a built-in import template accessible via a button labeled "Import starten" under its "Fähigkeiten" section; users can copy an export prompt into their source chatbot and paste the resulting output back into Claude to import settings. Prompt expert Susanne Renate Schneider published a more detailed prompt to capture additional user preferences (communication style, terms to avoid, workflow habits) because the standard template can miss data from heavy ChatGPT users. The t3n MeisterPrompter podcast tested these prompts across ChatGPT, Claude, Gemini and Le Chat; the Claude import worked smoothly, while Gemini presented an obstacle. The episode includes the extended prompt and a solution for Gemini issues.
Track Real-Time Market Signals & Shifts
Set up custom watchlists to receive automated, evidence-grounded executive digests whenever material signals or shifts occur across your tracked landscape.