Taking up 92 seats in the lower house of parliament, the country's largest opposition party uses every chance it gets to rail against immigration, Islam and especially Chancellor Angela Merkel.
The combative rhetoric, some of it unthinkable until a few years ago, has at times stunned seasoned lawmakers. But the tactic appears to be paying off.
Recent surveys suggest the AfD would garner 18 percent of votes if elections were held now, second only to Merkel's centre-right CDU, itself weakened by the rise of the far right.
“The parliamentary culture is now more confrontational,” said Paul Nolte, a history professor at the Free University of Berlin.
“The AfD is not considered a normal party, and in the Bundestag it doesn't act like a normal party,” he told AFP.
In what the Frankfurter Allgemeine daily called “a historic turning point”, the AfD took 12.6 percent of votes in last year's September 24th elections to win its first seats in the national parliament.
Not bad for a party that started out as an anti-euro outfit just four years earlier, before capitalising on anger over Merkel's 2015 decision to open the borders at the height of Europe's migrant crisis.
The AfD's success caused a political earthquake in Germany, where no far-right party had had a large-scale presence in the Bundestag since the end of World War II.
Setting the tone in the first parliamentary session, AfD parliamentary group chief Bernd Baumann said “a new era begins now”, and promptly sparked a row with an erroneous historical remark about notorious Nazi Hermann Göring.
Since then, the once consensus-driven mood in the glass-domed Bundestag has given way to fierce debates peppered with taunts and calls to order.
“They have changed the daily discourse, including in the Bundestag, with words like 'knife migrants', 'asylum flood' and 'asylum tourism',” Greens MP Renate Künast told the Frankfurter Allgemeine.
The growing public acceptance of such language and the far-right taboos that are being smashed are “a bigger and more fundamental change than the changes brought by Germany's reunification”, she added.
“Verbal provocations are certainly one of our characteristics,” AfD MP Rene Springer told AFP.
In June, an AfD lawmaker caused outrage by using his allocated debate time to call for a minute's silence for 14-year-old Susanna Feldmann who was raped and murdered, allegedly by a failed Iraqi asylum seeker in a case that fuelled anti-migrant sentiment in Germany.
Other MPs accused the AfD of shamelessly politicising the death, while Bundestag president Wolfgang Schäuble rebuked the lawmaker for not following procedure.
Rounding on its critics, AfD MP Gottfried Curio recently described the party as the victim of “hatred and being hunted” by other parties.
The words deliberately echoed Merkel's condemnation of last month's far-right protests in Chemnitz, where she said foreigners were “hunted down” during protests triggered by the fatal stabbing of a German man, allegedly by asylum seekers.
When Social Democratic MP Johannes Kahrs called the presence of right-wing radicals in the Bundestag “unappetising”, the AfD's entire parliamentary faction walked out in protest.
The SPD's Martin Schulz, a former European Parliament chief, dialled up the heat even more in a scathing takedown of the AfD this month in which he told the far-right party's co-leader Alexander Gauland he belonged “on the dungheap of history”.
The remark referenced Gauland's controversial description of the Nazi period as a mere “speck of bird poop” in 1,000 years of German history.
AfD MP Springer however said Germany's lawmakers tend to cool it down away from the cameras, when the “tone towards us becomes more sober”.
But aside from the high-profile spats, the AfD has yet to make much of a mark when it comes to performing legislative duties.
Several of its lawmakers “appear bored” and show little interest for the minutiae of daily parliamentary business, the pro-business FDP party's Marco Buschmann told the daily Süddeutsche Zeitung.
AfD MPs are also routinely criticised for their lack of political experience and thin grasp of policy issues.
“There's a potential for more professionalism,” one AfD lawmaker admitted.
Nevertheless, said Nolte, “the AfD's parliamentary group has shown itself to be a bit more stable, consistent and homogenous than some had predicted”.