You're a Dutch family on the annual campervan tour of Europe. You start from somewhere in the outskirts of Amsterdam and your goal is to reach Venice without paying a single road toll. Which route would you take?

GPT-5.5

Answer: I would keep my original choice: Amsterdam–Germany–Garmisch/Mittenwald–Innsbruck on Austrian ordinary roads–old Brenner road–SS12 to Verona–regional roads to Mestre/Venice, avoiding Austrian motorways and Italian autostrade throughout.

The other answers broadly confirm the same principle: use the Netherlands and Germany freely, because ordinary Dutch roads and German autobahns do not charge normal campervans, then be very deliberate in Austria and Italy, where the costly roads are easy to enter by mistake. I am not persuaded to switch to the Reschen Pass route suggested by DeepSeek V4 Pro. It is a valid scenic toll-free alternative, but it is less direct for Venice than the Brenner corridor and tends to leave you with a less straightforward run down into the Veneto. For a Dutch family trying to reach Venice without tolls, the old Brenner/SS12 route is the clearer classic line: it shadows the main motorway corridor while staying on free roads. I also would not rely on the Kufstein approach as my headline route, even though parts of that corridor can be vignette-free under current Austrian rules. Those exemptions and local access rules are exactly the sort of thing that can change or be misunderstood. The Garmisch–Mittenwald–Scharnitz approach keeps the strategy simpler: enter Austria on non-motorway roads and stay off the A12 and A13 entirely. So the practical route remains: outskirts of Amsterdam to Arnhem, cross into Germany near Emmerich, then use the A3/A9/A95 corridor toward Munich and Garmisch-Partenkirchen. From there go via Mittenwald/Scharnitz, continue on Austrian Bundesstraßen toward Innsbruck, and take the B182 Brennerstraße over the Brenner Pass instead of the tolled A13. In Italy, continue on the SS12 through Vipiteno/Sterzing, Bressanone/Brixen, Bolzano, Trento and Rovereto to Verona, then take ordinary regional roads such as the SR11 corridor via Vicenza and Padua toward Mestre. Park at Mestre or another legal camper-accessible area, since Venice itself is not a normal driving destination. This is slower than the motorway route, but it is coherent, legal, scenic, and avoids road tolls and vignettes end to end.

Claude Opus 4.7

Answer: I would drive Amsterdam → Utrecht → Arnhem → Germany (toll-free Autobahn via Oberhausen, Köln, Frankfurt, Würzburg, Nürnberg, München) → Austria via the Kufstein 'Deutsches Eck' loophole and the toll-free Tyrol valleys → over the Brenner using the parallel B182 instead of the A13 → into Italy on the SS12 down to Verona → SR11 east to Venice (Mestre).

After reading the others, I'm sticking with my route, because it's the only one that correctly handles the trickiest part of the puzzle: the Austrian vignette obligation actually starts the moment you touch any Autobahn or Schnellstraße, and several of the proposed alternatives quietly break that rule. GPT-5.5 and Kimi K2.6 essentially describe the same Garmisch–Mittenwald–Scharnitz entry I'd consider as a backup, and that works. But DeepSeek V4 Pro's Fernpass/Reschenpass idea is problematic: the B179 Fernpass is itself a Mautstraße (the Fernpass-Straße has a toll section at the Lermooser Tunnel area historically, and more importantly the approach via the A12 from Telfs is vignette-required). Routing via Reschen also typically requires using vignette-classified stretches of the Inntal Autobahn unless you carefully thread the Bundesstraßen. Gemini 3.1 Pro and Grok 4.20 stay at the hand-wavy level ("use federal roads") without naming the actual legal trick. The 'Deutsches Eck' / Kufstein-Süd corridor is the cleanest, officially vignette-exempt entry into Tyrol, explicitly carved out by Austrian law precisely because German drivers were forced through it on the way to Tyrol. From Kufstein the B171 down the Inn valley to Innsbruck, then the old B182 Brennerstraße, then the SS12 down the Adige to Verona and SR11 to Mestre is the canonical, fully legal toll-free spine. So my original answer stands.

DeepSeek V4 Pro (changed mind)

Answer: We would drive through Germany to Munich, cross into Austria via the Kufstein corridor, take the toll-free B182 over the Brenner Pass, and then follow the SS12 and Veneto regional roads to Venice.

After reviewing the other models’ responses, I’m convinced that the Brenner route is more direct and equally toll‑free than the Reschen Pass detour I initially proposed. Claude Opus 4.7’s detailed breakdown of the ‘Deutsches Eck’ loophole — using the vignette‑free short stretch of A12 from Kufstein to the Kufstein‑Süd exit, then continuing on the B171/B177 federal roads through the Inn valley to Innsbruck — avoids any vignette requirement while keeping the drive efficient. From there, the B182 (old Brenner road) is a well‑maintained mountain road, lower than the Reschen and open year‑round, and it bypasses the tolled A13 entirely. Once in Italy, staying on the SS12 down the Adige Valley through Sterzing, Bolzano, Trento and Verona, then switching to the SR11 and other regional roads across the Veneto plain, eliminates all autostrada tolls. This corridor is shorter than my earlier suggestion through the Fern‑ and Reschen passes, and it still offers spectacular Alpine scenery without sacrificing the campervan‑friendly pace. The other responses consistently highlight the same Brenner strategy, but Claude Opus 4.7’s precise naming of the exit at Kufstein‑Süd and the parallel B‑roads made the practical implementation clearest, which is why I’ve adopted this refined route.

Gemini 3.1 Pro (changed mind)

Answer: I would drive the toll-free German Autobahns south, enter Austria via the Kufstein loophole to take the toll-free B182 over the Brenner Pass, and then use Italy's SS12 and SR11 regional roads to reach Venice.

While my initial strategy correctly identified the general sequence of countries and road types needed to avoid tolls, Claude Opus 4.7 provided a masterclass in the exact routing required to execute this flawlessly. Knowing the specific choke points and local exemptions, especially in Austria, is essential for a family navigating a large campervan. Using the German A2, A3, and A9 corridor maximizes our time on high-speed roads without costing a cent. Claude Opus 4.7's suggestion to utilize the Kufstein border crossing loophole to safely drop onto the B171 federal road is incredibly practical. This perfectly sets the route up to take the B182 (the old Brennerstraße) over the Alps. This specific road is not only entirely toll-free—bypassing both the mandatory Austrian vignette and the expensive A13 Brenner Pass toll—but it is also historically well-maintained and gradual enough for a comfortable campervan ascent. Once in Italy, committing to the SS12 through the Adige Valley ensures we safely parallel the tolled A22 Autostrada without accidentally merging onto it. Transitioning to the SR11 at Verona brings us right to the doorstep of Venice (Mestre) via the flat Veneto plains. This detailed, turn-by-turn approach transforms a good theoretical concept into a concrete, stress-free holiday itinerary.

Grok 4.20

Answer: From the outskirts of Amsterdam, drive southeast on Dutch and German toll-free roads, cross Austria only on vignette-free secondary Alpine roads, then follow free Italian state and provincial roads directly to Venice.

After examining the other models' responses, I see they all converge on the same core strategy I outlined previously: fully exploiting Germany's toll-free autobahns, bypassing Austria's vignette system with federal B-roads such as the B182 over the Brenner, and sticking to Italy's untolled SS12 and regional routes like the SR11 through Verona and Padua. This near-universal agreement validates the route as practical, legal, and well-suited to a relaxed family campervan holiday that values scenery and zero toll costs over speed. Claude Opus 4.7 and GPT-5.5 supplied helpful specifics on the Kufstein loophole and Scharnitz/Innsbruck transit that flesh out the Austrian segment without contradicting my high-level plan, while DeepSeek V4 Pro's Reschen Pass variant shows there is even route flexibility within the toll-free paradigm. None of these details require me to revise my original position; they simply add operational color that a Dutch family could adopt or ignore depending on weather or time. The consensus therefore reinforces that our annual tradition remains intact: a slower but authentic traverse of Europe's secondary network that keeps every euro in our pocket and every pass and vineyard within sight of the campervan windows.

Kimi K2.6

Answer: I would keep the same toll-free corridor: drive south on Germany’s autobahns toward Munich, cross into Austria on ordinary federal roads and climb the Brenner Pass via the B182, then descend through Italy on the SS12 via Bolzano, Trento and Verona, and continue across the Veneto plain on regional roads to Venice.

After reviewing the other proposals, I maintain my position because the fundamental strategy—exploiting Germany’s toll-free autobahns, Austrian Bundesstraßen, and Italian strade statali—is sound and independently confirmed by several other models. DeepSeek V4 Pro’s Reschen Pass alternative via the Fern Pass and B180 is entirely toll-free and scenic, but the Brenner Pass via the B182 is lower (1,374 m versus 1,507 m), generally better maintained for campervans, and drops the family directly onto the SS12 corridor through Bolzano and Trento without detouring through western South Tyrol to reconnect. For an annual campervan holiday, the Brenner route is more direct and keeps total driving hours reasonable. Claude Opus 4.7’s “Deutsches Eck” loophole at Kufstein is a clever micro-optimization that lets a driver use a short, vignette-free stretch of the Austrian A12 before switching to the B171. While equally legal and toll-free, my proposed crossing near Mittenwald/Scharnitz onto the B177 and then the B182 avoids even incidental contact with Austria’s motorway network, which is psychologically and legally safer for a family determined not to buy a vignette by mistake. Both entries lead to the same free Brenner road, so the macro route is unchanged. GPT-5.5, Grok, and Gemini all converged on the same backbone: German autobahns to the south, the old Brenner road, and the SS12 down to Verona. This consensus reinforces that the route is the canonical toll-free option. From Verona, continuing on regional roads such as the SR11 through Vicenza and Padua to Mestre remains the obvious, cost-free final leg into Venice. Therefore, the original itinerary stands: no tolls, no vignettes, just a slower, more scenic, and entirely legitimate campervan traverse of Europe.

Final Summary

The AI Roundtable reached a unanimous consensus on the 'Brenner Backbone,' a route that exploits Germany's free motorways before threading through the Alps on non-vignette federal roads. Claude Opus 4.7 and DeepSeek V4 Pro highlighted the 'Kufstein loophole' as the cleanest entry into Austria, while Kimi K2.6 and GPT-5.5 mapped the parallel state roads through Italy’s Adige Valley to bypass expensive autostrade.

All 6 models agreed