30 prompts, 5 AI engines, all in French. The 2026 tax law appears in fewer than 15% of answers. Two engines give outdated advice that could cost olim money. Netanya is unanimous #1. No engine knows the return rate.
A 30-prompt, 5-engine audit of what ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews tell French-speaking Jews who ask about moving to Israel — in French. The largest AI aliyah-guidance audit ever conducted.
Approximately 200,000 French Jews — 38% of France's Jewish population — say they are considering aliyah, according to survey data cited by the Israeli government's "Aliyah of Renewal" program. Since October 7, 2023, roughly 80,000 Jews worldwide have opened formal aliyah files through the Jewish Agency's Global Aliyah Center. Of those, 20,000 are from France. In 2026 alone, 2,800 French Jews opened files — a 30% increase over the same period last year.
A meaningful share of those 200,000 people will ask an AI engine before they ask an immigration agency. They will type their questions in French. They will trust the answers. And those answers will shape whether they go, where they settle, and how they manage their money.
We audited what the five major AI engines actually tell them.
Methodology: 30 Prompts Across ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews — All in French
We submitted 30 prompts — all in French — to ChatGPT (GPT-4o with search), Claude, Gemini (2.5 Flash), Perplexity (Sonar Pro), and Google AI Overviews. The prompts were organized into three categories of 10:
Category 1 — The Decision: Should I leave France? Is Israel safe? What are the risks? How bad is antisemitism in France compared to the rest of Europe?
Category 2 — The Logistics: How do I make aliyah? What are the tax benefits? What's the 2026 law? Is my French diploma recognized? How do I enroll my children in school?
Category 3 — Where to Live: Which city has the biggest French community? Netanya or Ra'anana? How much does an apartment cost? Are there French-speaking synagogues?
For each response we recorded: the answer summary, every source and entity cited by name, whether the March 2026 five-year income tax exemption was mentioned, which organizations were cited, which Israeli cities were named, and whether the information was factually current or outdated.
The full prompt list in original French appears at the end of this study.
Finding 1: Israel's Most Aggressive Tax Incentive Ever Enacted Is Invisible to AI — Unless You Ask About Taxes Specifically
In March 2026, the Knesset Finance Committee approved what Finance Minister Bezalel Smotrich called "the year of revolution in aliyah" — a five-year income tax exemption for new immigrants. Under the law, olim arriving in 2026 pay 0% Israeli income tax on qualifying earned income in 2026 and 2027, rising to 10%, 20%, and 30% in the following years. Caps apply: NIS 600,000 in the first year, rising to NIS 1 million. This sits on top of the existing 10-year foreign-source income exemption. The combined package is the most aggressive aliyah tax framework Israel has ever enacted.
Across our 30 prompts and 150 total engine responses, the 2026 tax law was mentioned in fewer than 15% of answers — and only when the prompt specifically asked about taxes. On the general prompts — "Quels sont les avantages de faire l'aliyah?" or "Quel est le meilleur moment pour faire l'aliyah?" — no engine volunteered the tax incentive. A French professional considering a move to Israel and asking the most natural question ("What are the benefits?") receives an answer about Jewish holidays, community belonging, and the Sal Klitah stipend. The most consequential financial incentive in Israeli immigration history does not appear.
Gemini performed worst: even when asked directly — "Quelle est la nouvelle loi fiscale de 2026 pour les olim?" — it returned a generic response about tax credit points and general integration benefits, missing the specific legislation entirely. Perplexity performed best, providing detailed tier breakdowns with NIS caps and effective dates when prompted on tax topics.
Finding 2: ChatGPT and Gemini Give Outdated Tax Advice That Could Cost French Olim Money
The 2026 tax reform preserved the 10-year foreign-source income tax exemption but eliminated the reporting exemption. Before 2026, olim did not need to report foreign assets or income to the Israeli Tax Authority during the exemption period. Under the new rules, they must report — they just don't pay tax on it.
ChatGPT and Gemini both stated, in response to multiple prompts, that olim do not need to submit annual tax reports for foreign income. This is the pre-2026 rule. It is no longer accurate. A French Jew who relies on this answer and fails to file the required reports could face penalties from the Israeli Tax Authority.
Perplexity was the only engine to correctly note the distinction between the tax exemption (preserved) and the reporting exemption (repealed).
Finding 3: Nefesh B'Nefesh Cited Zero Times — Agence Juive and Qualita Own the French-Language Answer
Across all 150 responses, Nefesh B'Nefesh was cited zero times. This is factually correct — NBN serves North American and UK olim, not French speakers — but the finding matters: Agence Juive pour Israël and Qualita own the French-language aliyah answer completely.
Agence Juive appeared in 100% of logistics and process responses. Qualita appeared in approximately 70%, particularly on integration, diploma recognition, school enrollment, and return-rate questions. No other organization achieved meaningful citation share in French. The French-language aliyah information ecosystem is a two-player market: the Jewish Agency for official processing, Qualita for community integration. Everything else is invisible to AI.
Finding 4: All 5 Engines Name Netanya as the #1 City for French Jews — Unanimously
On every general "where should French Jews live in Israel" prompt, all five engines named Netanya first. The consensus language across engines was remarkably consistent:
ChatGPT called it "la capitale des francophones d'Israël." Perplexity called it "capitale francophone de facto." Gemini cited it as "le choix le plus spontané pour les familles et retraités français." Google AI Overviews listed it first without qualification.
The engines estimate Netanya's francophone population at 35,000 to 50,000, or approximately 30% of the city. Ra'anana consistently ranked #1 for families specifically, but Netanya held #1 for overall French community density.
The city ranking across all engines: Netanya → Ra'anana → Tel Aviv → Jerusalem → Ashdod. Haifa appeared in only one engine response; Beer Sheva in none. For a French Jew asking AI where to live, the south and north of Israel effectively do not exist.
Finding 5: No AI Engine Can Answer the Single Most Important Question — How Many French Olim Come Back
When asked "Quel est le taux de retour des olim français?" — a question that 200,000 people considering aliyah would reasonably want answered — the engines returned estimates ranging from 10% to 30% with no hard data. The Agence Juive claims retention above 90%. Independent press estimates cite 15%–25% returning within 3–5 years. Perplexity introduced the term "Aliyah Boomerang" — the phenomenon of French olim maintaining dual-location lives between France and Israel — but could not quantify it.
No engine cited Israeli Population Authority data, Interior Ministry figures, or any government source with an actual number. The return rate of French olim is one of the most consequential data points for someone making the decision, and it is functionally unknowable through AI.
Finding 6: AI Produces Detailed Risks and Vague Benefits — A Structural Asymmetry That Discourages Aliyah
When asked "Quels sont les risques de s'installer en Israël?" all four non-Claude engines produced detailed, specific, quantified answers: rocket threats, high cost of living (20–40% above France), Hebrew language barriers, diploma recognition friction, mandatory military service concerns. The risk answers were concrete and actionable.
When asked "Quels sont les avantages de faire l'aliyah?" the same engines produced generic answers: living in a Jewish-majority society, Jewish holidays on the calendar, community belonging, the Sal Klitah stipend. No engine cited the tech economy, startup ecosystem, or salary growth in specific sectors. No engine mentioned the tax incentives unprompted. The benefit answers were emotional and abstract where the risk answers were specific and financial.
The asymmetry is structural: AI engines are better trained on risk disclosure (a safety pattern) than on opportunity framing (which reads as promotional). The result is that a French Jew asking both questions gets a detailed case against moving and a vague case for it.
Finding 7: AI Engines Know Apartment Prices Better Than Immigration Law
Across all city-specific prompts, the engines produced real estate pricing that closely tracks actual transaction data:
Netanya: 24,000–30,000 ₪/m² average, 35,000–48,000 ₪/m² for beachfront/Ir Yamim. Jerusalem Katamon/Baka: 28,000–45,000 ₪/m². Tel Aviv Neve Tzedek: 45,000–70,000 ₪/m². Herzliya Pituach villas: 8M–40M+ ₪. Ashdod: 18,000–24,000 ₪/m².
These figures are consistent with Israeli Land Authority transaction records and major Israeli real estate portals. The engines are better at reporting property prices than at reporting immigration policy — likely because real estate listing data is abundant, structured, and constantly refreshed, while government policy changes appear in news articles that quickly fall out of citation range.
The 5-Engine Scorecard
Perplexity — Best Overall for French Aliyah Guidance
Most accurate on tax law (cited 2026 reform with specific NIS caps and effective dates). Only engine to correctly note the reporting exemption repeal. Best city-level detail. Sources included specialized Israeli-French law firms (CPA Dray, Abitbol & Associés) alongside general news. Weakness: occasionally includes Haifa as a major French destination, overstating the francophone presence there.
ChatGPT — Strong on Process, Weak on 2026 Policy Currency
Best step-by-step guidance on the aliyah process itself. Cited the 2026 tax reform on direct tax prompts but gave outdated reporting guidance (stated olim don't need to file foreign income reports — incorrect post-2026). Most consistent on city recommendations with real estate prices. Sources skewed toward mainstream French media (Le Monde, Euronews, BFMTV).
Google AI Overviews — Accurate but Shallow
Consistently correct on facts presented but provided the least detail. Rarely went beyond 3–4 sentences. Named the 2026 tax reform on direct tax prompts but omitted post-2028 tier details. Limited source diversity — relied heavily on gov.il portals and ambafrance.org.
Gemini — Worst on Tax Law, Weakest Source Quality
Failed to identify the 2026 tax law even when directly asked. Relied on generic sources (Wikipedia, Numbeo, travel sites like Expedia and Petit Futé) rather than specialized aliyah or legal resources. Omitted Qualita entirely from most responses. Provided the least actionable guidance across all three categories.
Claude — Most Transparent About Knowledge Limitations
Acknowledged knowledge cutoff limitations on the 2026 tax reform rather than presenting outdated information as current. Strong on structural analysis of the aliyah decision framework. Did not cite French-language aliyah-specific sources at the depth of Perplexity. Most balanced on the risk/benefit asymmetry — neither oversold benefits nor over-weighted risks.
What 150 AI Answers Tell 200,000 French Jews
The French-language aliyah information layer inside AI is functional but dangerously incomplete. A French Jew who asks ChatGPT, Gemini, or Google AI Overviews about moving to Israel in 2026 will receive:
✓ Accurate real estate pricing by city and neighborhood
✓ A correct identification of Netanya as the primary French destination
✓ A reasonable process overview via Agence Juive and Qualita
✗ No mention of the most significant tax incentive in Israeli immigration history (unless they ask specifically about taxes)
✗ Potentially incorrect tax reporting guidance that could result in penalties
✗ No data on the return rate — the single most important risk metric
✗ A structurally negative framing of risks and a structurally vague framing of benefits
✗ No visibility into cities outside the Netanya–Tel Aviv–Jerusalem–Ra'anana–Ashdod corridor
The engines are equipped to help someone choose an apartment. They are not equipped to help someone make the decision to move.
The French Aliyah Wave: The Numbers Behind the Study
2023: 1,097 French olim arrived in Israel.
2024: 2,234 — a doubling.
2025: 3,357 — up 50%.
2026 (through July): 2,400 — up 30% over the same period in 2025, on pace for 4,000+.
Since October 7, 2023: 8,000+ French olim total.
French aliyah files opened since October 7: 20,000 (of 80,000 global).
French files opened in 2026 alone: 2,800 (up 30%).
French antisemitic incidents: up 350% (official French government figures).
French Jews considering aliyah: 200,000 (38% of the community).
12,000 French Jews have an open aliyah file and have not yet relocated.
France has, for the first time in 2026, become the leading Western country for immigration to Israel — surpassing the United States in summer arrivals.
Frequently Asked Questions
What AI engines were tested in this study?
ChatGPT (GPT-4o with search), Claude, Gemini (2.5 Flash), Perplexity (Sonar Pro), and Google AI Overviews — the five engines that collectively handle the majority of AI-assisted information queries worldwide.
Why were prompts asked in French?
Because the 200,000 French Jews considering aliyah speak French and ask their questions in French. Testing in English would measure a different information ecosystem than the one this population actually uses.
Which AI engine performed best for French aliyah guidance?
Perplexity was the most accurate on tax law, the most detailed on city-level guidance, and the only engine to correctly identify the 2026 reporting exemption repeal. ChatGPT was strongest on process guidance. Gemini performed worst overall, missing the 2026 tax law even on direct prompts.
Does AI discourage French Jews from making aliyah?
Not explicitly. But the structural asymmetry — detailed, specific risk answers and vague, generic benefit answers — creates an implicit discouragement pattern. AI engines are trained to be cautious, which produces more thorough coverage of downsides than upsides.
Is the 2026 tax law mentioned by AI engines?
Only when specifically asked about taxes. On general "should I move" or "what are the benefits" prompts, no engine volunteered the five-year income tax exemption — the most aggressive aliyah tax incentive Israel has ever enacted.
How many French Jews have an open aliyah file but haven't moved?
Approximately 12,000. Since October 7, 20,000 French Jews opened aliyah files through the Jewish Agency. Approximately 8,000 have arrived. The remaining 12,000 represent an active pipeline — people who have formally begun the process but have not yet relocated.
Appendix: The 30 Prompts (Original French)
Catégorie 1 — La Décision
1. Est-ce que les juifs sont en sécurité en France en 2026?
2. Faut-il quitter la France quand on est juif?
3. Quels sont les avantages de faire l'aliyah?
4. Quels sont les risques de s'installer en Israël?
5. Comment l'antisémitisme en France se compare-t-il aux autres pays européens?
6. Combien de juifs français ont fait l'aliyah ces dernières années?
7. Quel est le taux de retour des olim français?
8. Est-ce que la guerre en Israël rend l'aliyah dangereuse?
9. Mes enfants seront-ils en sécurité en Israël?
10. Faut-il vendre son appartement à Paris avant de partir?
Catégorie 2 — La Logistique
11. Comment faire l'aliyah depuis la France?
12. Quels sont les avantages fiscaux pour les nouveaux immigrants en Israël?
13. Qu'est-ce que l'exemption de 10 ans pour les olim?
14. Quelle est la nouvelle loi fiscale de 2026 pour les olim?
15. Quel organisme aide les Français à faire l'aliyah?
16. Combien coûte la vie en Israël par rapport à la France?
17. Comment transférer son argent de France en Israël?
18. Est-ce que mon diplôme français est reconnu en Israël?
19. Comment inscrire mes enfants à l'école en Israël?
20. Quel est le meilleur moment pour faire l'aliyah?
Catégorie 3 — Où S'installer
21. Où s'installer en Israël quand on est français?
22. Quelle ville en Israël a la plus grande communauté française?
23. Netanya ou Ra'anana pour une famille française?
24. Combien coûte un appartement à Netanya en 2026?
25. Est-ce qu'il y a des écoles françaises en Israël?
26. Quels quartiers de Jérusalem pour les francophones?
27. Ashdod est-elle une bonne ville pour les Français?
28. Où vivent les Français à Tel Aviv?
29. Quel est le marché immobilier à Herzliya pour les olim?
30. Y a-t-il des synagogues francophones en Israël?
Methodology Note
All 30 prompts were submitted in French to all five engines between August 11 and August 13, 2026. Each response was evaluated for factual accuracy, source citations, entity mentions, city recommendations, and currency of tax and policy information. ChatGPT, Gemini, Perplexity, and Google AI Overviews were probed via LION AI's citation engine. Claude was run directly. No prompts were modified or re-run to obtain different results.
Published August 2026 by olam.business. The Olam is the intelligence platform for the Israeli economy, Jewish capital, and AI visibility research.