Real ChatGPT answer + Gemini simulation · index seedkVFqAp1l2rQcompleteAI OverviewTravel and hospitality · flights and airlinescommercial
Do budget airlines like Spirit or Frontier charge extra for a standard backpack that fits the JetBlue carry on dimensions?
ChatGPTgpt-6Geminigemini-3.5-flash-lite3 passes + 1 real-search37 queries10/30/2026
Download run
Gemini unique queries
34
2 in ≥ half the passes · stability 35%
ChatGPT real searches predicted
67%
2 of 3 matched the simulation
Fan-out diagram
Seed → topic clusters → sub-queries, per model.
SEED QUERY
Do budget airlines like Spirit or Frontier charge extra for a standard backpack that fits the JetBlue carry on dimensions?
34 unique queries · 3 passes
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
ChatGPT real searches (3)
Classes come from the query-classifier (a local Laya model). 3 of 3 calls are low-confidence (under 50%) — hover a query in the table to see its confidence. 34 queries are still being classified.
What the models actually searched
Each model answered the query with its own web search. These are the searches it ran, matched to the closest simulated query.
ChatGPT3 real searches · gpt-667% predicted
Spirit Airlines personal item size backpack included carry-on bag fee official policy 2026 Google ↗
Frontier Airlines personal item size backpack included carry-on bag fee official policy 2026 Google ↗
JetBlue carry-on dimensions official 2026 Google ↗
- Carry-On Bags · jetblue.com
- SPIRIT AIRLINES CONTRACT OF CARRIAGE 20 · content.spirit.com
- Bag Options · flyfrontier.com
Semantic map
Every query placed by meaning (EmbeddingGemma 2, 256-d). Shaded regions are topics, nearby points are near-paraphrases, and a circle's size is how often the query came back.
Colour
SimulatedReal search
Hover a query to see its counterpart · click a topic to focus it · zoom with Ctrl/⌘ + scroll, a pinch, double-click or +
Queries
34 queries · click a column to sort
| Query / type | Search | Intent | Query class | Routing format | Cluster | Freq ↓ | Weight |
|---|---|---|---|---|---|---|---|
jetblue carry on dimensions free allowance REFORMULATION | Google ↗ AI Mode ↗ | The user wants to verify the exact free carry-on allowance and dimensions specified by JetBlue. | — | product_spec_sheet | airline baggage size comparison | 2x of 3 | |
frontier airlines personal item sizer box dimensions RELATED | Google ↗ AI Mode ↗ | The user wants to know the exact physical dimensions of Frontier's airport baggage sizer. | — | faq_page | frontier personal item sizer dimensions | 2x of 3 | |
spirit airlines personal item size limits compared to jetblue REFORMULATION | Google ↗ AI Mode ↗ | The user wants a direct comparison between Spirit and JetBlue personal item dimensions. | — | comparison_table | spirit personal item size enforcement | 1x of 3 | |
spirit and frontier baggage size limits compared to jetblue REFORMULATION | Google ↗ AI Mode ↗ | The user wants a direct size comparison of personal items and carry-on bags across Spirit, Frontier, and JetBlue. | — | comparison_table | airline baggage size comparison | 1x of 3 | |
spirit airlines personal item size limits vs jetblue carry on COMPARATIVE | Google ↗ AI Mode ↗ | The user wants to compare the exact baggage dimension limits between Spirit Airlines and JetBlue. | — | comparison_table | spirit personal item size enforcement | 1x of 3 | |
does frontier charge for a normal school backpack REFORMULATION | Google ↗ AI Mode ↗ | The user wants to know if Frontier considers a standard school backpack as a chargeable carry-on or a free personal item. | — | faq_page | standard backpack fees on budget airlin… | 1x of 3 | |
does frontier charge for a standard school backpack RELATED | Google ↗ AI Mode ↗ | The user wants to know if a typical school backpack will incur fees on Frontier Airlines. | — | faq_page | standard backpack fees on budget airlin… | 1x of 3 | |
do spirit or frontier charge for a standard backpack RELATED | Google ↗ AI Mode ↗ | The user wants to know if a standard school or travel backpack counts as a paid carry-on or free personal item on ultra-low-cost carriers. | — | faq_page | standard backpack fees on budget airlin… | 1x of 3 | |
ultra low cost carrier personal item baggage fees 2024 ENTITY EXPANSION | Google ↗ AI Mode ↗ | The user wants an overview of baggage fees across multiple ultra low cost carriers. | — | pricing_page | personal item versus carry on fees | 1x of 3 | |
airline personal item vs carry on backpack fees IMPLICIT | Google ↗ AI Mode ↗ | The user is looking for a comprehensive overview of how ultra-low-cost carriers charge for backpacks versus larger overhead items. | — | web_article | personal item versus carry on fees | 1x of 3 | |
personal item vs carry on bag fees spirit airlines IMPLICIT | Google ↗ AI Mode ↗ | The user needs to understand the exact fee structure for personal items versus overhead carry-ons on Spirit Airlines. | — | pricing_page | personal item versus carry on fees | 1x of 3 | |
how to measure a backpack for airline personal item size RELATED | Google ↗ AI Mode ↗ | The user wants to learn the proper technique for measuring their backpack to see if it fits airline sizers. | — | how_to_steps | frontier personal item sizer dimensions | 1x of 3 | |
spirit vs frontier vs jetblue baggage policy dimensions COMPARATIVE | Google ↗ AI Mode ↗ | The user wants to compare the baggage policies of all three airlines simultaneously. | — | comparison_table | airline baggage size comparison | 1x of 3 | |
frontier airlines personal item dimensions and fees ENTITY EXPANSION | Google ↗ AI Mode ↗ | The user wants specific dimensional limits and associated costs for personal items specifically on Frontier Airlines. | — | product_spec_sheet | frontier personal item sizer dimensions | 1x of 3 | |
how to avoid spirit baggage fees with a backpack PERSONALIZED | Google ↗ AI Mode ↗ | The user wants practical packing strategies to ensure their backpack fits within free personal item limits to save money. | — | how_to_steps | packing tips to avoid bag fees | 1x of 3 | |
are backpacks allowed under the seat on spirit airlines IMPLICIT | Google ↗ AI Mode ↗ | The user wants to confirm if a standard backpack will fit in the under-seat space on Spirit without incurring fees. | — | web_article | underseat backpack size for budget airl… | 1x of 3 | |
ultra low cost carrier bag size comparison ENTITY EXPANSION | Google ↗ AI Mode ↗ | The user wants to see general baggage rules across the broader category of budget airlines. | — | buyers_guide | airline baggage size comparison | 1x of 3 | |
i travel light frequently and want to avoid airline bag fees PERSONALIZED | Google ↗ AI Mode ↗ | The user seeks tips and strategies for minimalist packing to avoid extra airline charges. | — | buyers_guide | packing tips to avoid bag fees | 1x of 3 | |
jetblue carry on size limits compared to ultra low cost carriers COMPARATIVE | Google ↗ AI Mode ↗ | The user wants to understand the policy gap between standard legacy/hybrid carriers like JetBlue and budget airlines. | — | web_article | airline baggage size comparison | 1x of 3 | |
best travel backpack that fits under seat spirit airlines PERSONALIZED | Google ↗ AI Mode ↗ | The user is looking for specific backpack recommendations that comply with Spirit's strict under-seat limits. | — | review_roundup | underseat backpack size for budget airl… | 1x of 3 | |
will a jetblue carry on fit under the seat on spirit REFORMULATION | Google ↗ AI Mode ↗ | The user wants to know if a bag sized for JetBlue's overhead bin can fit under the seat as a personal item on Spirit. | — | forum/qna | underseat backpack size for budget airl… | 1x of 3 | |
frontier personal item sizer box dimensions RELATED | Google ↗ AI Mode ↗ | The user wants to know the exact interior dimensions of Frontier's airport baggage sizer. | — | product_spec_sheet | frontier personal item sizer dimensions | 1x of 3 | |
will a standard backpack count as a personal item or carry on RELATED | Google ↗ AI Mode ↗ | The user wants to know how standard backpacks are generally classified by airlines. | — | faq_page | personal item versus carry on fees | 1x of 3 | |
spirit airlines personal item size limit 2026 IMPLICIT | Google ↗ AI Mode ↗ | The user wants to ensure the baggage size rules haven't recently changed for Spirit Airlines. | — | web_article | spirit personal item size enforcement | 1x of 3 | |
do budget airlines charge for backpacks that fit under seat REFORMULATION | Google ↗ AI Mode ↗ | The user wants to know the universal rule regarding under-seat items on ultra low cost carriers. | — | forum/qna | underseat backpack size for budget airl… | 1x of 3 | |
allegiant air vs spirit airlines personal item size comparison COMPARATIVE | Google ↗ AI Mode ↗ | The user wants to compare Allegiant's baggage size restrictions with Spirit's. | — | comparison_table | spirit personal item size enforcement | 1x of 3 | |
how strictly does spirit airlines enforce personal item size RELATED | Google ↗ AI Mode ↗ | The user wants to know real-world enforcement experiences regarding backpack sizes on Spirit. | — | forum/qna | spirit personal item size enforcement | 1x of 3 | |
backpack dimensions that fit all airline personal item requirements ENTITY EXPANSION | Google ↗ AI Mode ↗ | The user is looking for universal travel backpack dimensions that comply with the strictest budget airline rules. | — | buyers_guide | underseat backpack size for budget airl… | 1x of 3 | |
avoid spirit bag fees backpack packing tips IMPLICIT | Google ↗ AI Mode ↗ | The user wants advice on how to pack a backpack so it fits free personal item dimensions. | — | how_to_steps | packing tips to avoid bag fees | 1x of 3 | |
what happens if my personal item is too big on spirit RELATED | Google ↗ AI Mode ↗ | The user wants to know the financial penalty and gate procedure if a backpack exceeds the personal item size on Spirit. | — | faq_page | spirit personal item size enforcement | 1x of 3 | |
what counts as a personal item vs carry on bag ENTITY EXPANSION | Google ↗ AI Mode ↗ | The user wants a clear definition distinguishing personal items from standard carry-on bags across the airline industry. | — | glossary/definition | personal item versus carry on fees | 1x of 3 | |
allegiant air vs spirit personal item size limits ENTITY EXPANSION | Google ↗ AI Mode ↗ | The user wants to compare Spirit's policy with another major ultra-low-cost carrier. | — | comparison_table | spirit personal item size enforcement | 1x of 3 | |
avoiding spirit backpack fees travel packing tips RELATED | Google ↗ AI Mode ↗ | The user wants practical tips on how to pack a backpack so it avoids Spirit's extra charges. | — | checklist | packing tips to avoid bag fees | 1x of 3 | |
maximum backpack size for free carry on spirit frontier REFORMULATION | Google ↗ AI Mode ↗ | The user wants the absolute maximum dimensions allowed for a backpack to travel completely free on Spirit or Frontier. | — | checklist | standard backpack fees on budget airlin… | 1x of 3 |
Passes
Does another pass still surface new queries? A flattening curve means the fan-out has stabilised.
Geminix = pass, y = cumulative unique queries
| Model | Pass | Target | Generated | Seconds | Tokens (in / out) | Notes |
|---|---|---|---|---|---|---|
| gemini-3.5-flash-lite | 1 | 12 | 12 | — | 917 / 1,548 | |
| gemini-3.5-flash-lite | 2 | 12 | 12 | — | 917 / 1,453 | |
| gemini-3.5-flash-lite | 3 | 12 | 12 | — | 917 / 1,398 |