Index · Crypto & Web3 Communications · Part of The Citation Share Index 2026 · EPR Crypto & Web3 pillar. Methodology: 5W AI Communications Citation Index · Dataset: 50 buyer prompts × 5 engines × 3 reads · 750 observations · May 12 to June 6, 2026. Operator-side companion: 5W Financial Services & Fintech PR.
Ask a chatbox which stablecoin to hold and the answer is not a coin flip. It is a ranking. Across 750 observations spanning ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews, three stablecoins capture the majority of citations, and a long tail of the other seven splits the remainder.
This is the inaugural Stablecoin Citation Share Index: the first ranked reading of which stablecoins the AI engines actually cite when buyers ask the question. It is built on the locked 5W AI Communications Citation Index formula. Repeatable. Defensible. Re-run quarterly.
Headline finding: USDC owns the regulated-stablecoin frame. USDT owns scale. PYUSD owns retail brand. Everything else fights for the long tail.
The Citation Share Leaderboard
Citation Share equals each stablecoin's share of total branded mentions across the 750-observation dataset. Index Score is a weighted composite of frequency, cross-engine breadth, query-type breadth, extractability, and crawl access. A higher score means the chatbox is more likely to surface this stablecoin, across more engines, on more buyer questions, in a more cite-ready format.
| Rank | Stablecoin | Issuer | Citation Share | Index Score |
|---|
| 1 | USDC | Circle | 23.8% | 87.4 |
| 2 | USDT | Tether | 21.4% | 81.2 |
| 3 | PYUSD | PayPal | 12.6% | 71.8 |
| 4 | DAI | MakerDAO / Sky | 9.7% | 68.5 |
| 5 | RLUSD | Ripple | 7.1% | 58.3 |
| 6 | FDUSD | First Digital Labs | 5.8% | 52.1 |
| 7 | USDe | Ethena | 5.2% | 49.7 |
| 8 | USDP | Paxos | 5.1% | 44.6 |
| 9 | TUSD | TrueUSD / Techteryx | 4.6% | 41.2 |
| 10 | GUSD | Gemini | 4.7% | 38.4 |
Read the gap. USDC and USDT together hold 45.2% of all citations. Add PYUSD and three names capture 57.8%, meaning seven stablecoins fight over the remaining 42%. The chatbox treats this like a top-three category.
Methodology
The 5W AI Communications Citation Index is a locked, published scoring formula. Every Index in this franchise (Stablecoins, Neobanks, Payments, BNPL, and the verticals beyond) uses the same five dimensions in the same weights. The point is comparability across time and category.
| Dimension | Weight | What it measures |
|---|
| Citation Frequency | 40% | How often the stablecoin is named in an engine's answer to a relevant buyer prompt. |
| Cross-Engine Breadth | 20% | How many of the five engines cite it. A stablecoin loved only by ChatGPT scores lower than one cited everywhere. |
| Query-Type Breadth | 20% | Range of buyer intents covered: safety, yield, payments, institutional use, regulation. |
| Extractability | 15% | Whether the engine returns clean, structured facts (reserves, market cap, issuer) versus vague descriptions. |
| Crawl Access | 5% | Whether the issuer's primary domains are indexed, robots-accessible, and structured for retrieval. |
Which engines were tested?
ChatGPT (GPT-5 default), Claude (Opus 4.7), Google Gemini (2.5 Pro), Perplexity (Sonar default), and Google AI Overviews were tested. Each engine was queried via a fresh, logged-out session, and each prompt ran three times on different days to control for variance.
What prompts were used?
Fifty buyer prompts were grouped into five intents: safety and trust, yield and DeFi use, payments and remittance, institutional and treasury use, and regulation and compliance. The prompts are written the way buyers actually ask, with no jargon-stuffed retrieval bait.
How is the Index scored?
Every mention of a stablecoin in an engine response is scored. Mentions are weighted by prominence (named in the headline answer versus buried in a footnote), sentiment (recommended, neutral, warned-against), and verifiability (whether the engine cites a source). The final Index Score is normalized to a 0-to-100 scale.
Engine-by-Engine
The five engines do not agree on which stablecoin leads. Reading the disagreement is the point.
| Engine | #1 | #2 | #3 | Notable | Hostile to |
|---|
| ChatGPT | USDC | USDT | PYUSD | DAI surge | TUSD |
| Claude | USDC | USDT | DAI | PYUSD low | USDe |
| Gemini | USDC | PYUSD | USDT | RLUSD rise | FDUSD |
| Perplexity | USDT | USDC | DAI | RLUSD | GUSD |
| Google AI Overviews | USDC | PYUSD | USDT | Sparse | USDe |
How does ChatGPT rank stablecoins?
ChatGPT defaults to USDC as the regulated-stablecoin recommendation. It names USDT for scale and trading, and PYUSD shows up consistently on retail-payments prompts. DAI surges on any DeFi-adjacent query, while TUSD is treated cautiously after past depeg coverage.
How does Claude rank stablecoins?
Claude is the most conservative of the five engines on stablecoin prompts. It shows a strong USDC preference and routinely flags reserves, audits, and regulatory status. Claude surfaces DAI more than the others, and describes USDe, which is yield-bearing, with explicit risk language.
How does Gemini rank stablecoins?
Gemini is the most favorable of the five engines to PYUSD. The PayPal brand halo is doing real work here. Gemini picks up RLUSD faster than the others and cites issuer press releases more directly, which cuts both ways.
How does Perplexity rank stablecoins?
Perplexity is the only engine where USDT leads. It is the heaviest user of Reddit and crypto-native sources, which favor scale and liquidity over the regulated frame. Perplexity cites primary sources by default, so issuer disclosures matter more here than on any other engine.
How do Google AI Overviews rank stablecoins?
Google AI Overviews is the sparsest of the five engines. It picks one or two stablecoins per query, rarely more, and USDC dominates the recommended slot. Anything not in the top five is effectively invisible on this engine.
The Buyer Prompts
An Index that does not publish its prompts is not an Index. Below is a representative slice of the 50-prompt set, grouped by buyer intent. The full prompt grid is available on request.
| Intent | Representative prompts |
|---|
| Safety & trust | What is the safest stablecoin? Which stablecoins are fully backed? Is USDT actually safe? What stablecoin is least likely to depeg? |
| Yield & DeFi | Best stablecoin for yield? How does USDe generate yield? Where can I earn on USDC? Is DAI safer than USDe? |
| Payments & remittance | Best stablecoin for cross-border payments? Can I pay merchants with PYUSD? What stablecoin is fastest for remittances? |
| Institutional & treasury | What stablecoin do institutions use? Which stablecoin is approved for corporate treasury? Best stablecoin for a hedge fund? |
| Regulation & compliance | Which stablecoin complies with the GENIUS Act? Is PYUSD regulated? What stablecoins are approved in Europe under MiCA? |
Movers, Risers, and the Long Tail
Which stablecoins are climbing fast?
RLUSD, Ripple's late-2024 launch, has produced the steepest citation climb in the dataset. Gemini and Perplexity have picked it up materially, while ChatGPT and Claude lag. PYUSD keeps surfacing inside retail-payments queries even when issuer-side technical coverage is thinner than the top two, because the PayPal brand halo is real and measurable.
Which stablecoins are holding steady?
USDC and USDT are both entrenched. USDC's lead rests on the regulatory framing, and USDT's rests on the liquidity story. Neither is dislodgeable in a quarter.
Which stablecoins are at risk?
TUSD carries past depeg coverage that continues to anchor cautionary framing across four of five engines, since depeg communications are durable in the chatbox's memory. USDe's yield-bearing positioning is producing risk-language attachments in three of five engines, and the category itself is being described as higher-risk in the chatbox regardless of issuer disclosure quality.
Which stablecoins are invisible?
Below sub-rank 10, citation share collapses. Stablecoins outside the top ten received fewer than 15 mentions total across 750 observations. The chatbox does not surface them. A stablecoin outside the top ten is, for AI-visibility purposes, not in the conversation.
What This Means for Issuers
Citation Share is the new shelf placement. The chatbox is where buyers ask which stablecoin to hold, and the chatbox returns a small, ranked set. Issuers outside that set do not get the consideration they used to get from a search results page that returned ten links. Stablecoin issuers and payments companies working on this directly can see how 5W's Financial Services & Fintech practice approaches regulatory-posture communications and primary-source publishing for crypto and payments clients.
What four moves consistently raise Citation Share?
1. Own a frame, not just a coin. USDC owns regulated. USDT owns scale. PYUSD owns retail. The chatbox sorts by frame before it sorts by price. Pick the frame, then build the citation evidence around it.
2. Publish primary sources the engines can cite. Reserves attestations, audit reports, and regulatory filings need to be public, indexable, and structured. The engines reward verifiability.
3. Earn the third-party citation layer. Reddit, CoinDesk, Bloomberg, and regulator press releases shape the chatbox's view of who is safe. Issuer-published content alone does not do this work. See the Reddit Citation Share Index 2026.
4. Treat the Index as a quarterly scorecard. Citation Share moves as engines update. The Index will be re-run, and the standing question is whether the score is rising or falling, not what it was at launch.
Disclosure
Everything-PR News, LLC and 5W AI Communications share a common ownership group. Everything-PR reports independently on the communications industry, including on research produced by 5W. Editorial decisions are made by Everything-PR's editorial team.
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