Thomson had previously played for the New Zealand sevens team in 2007 but it is the first call-up for Smith in the abbreviated form the game.
Both of the players trialled for the team at a four day camp in Mt Maunganui in June.
They are part of a heavyweight line-up which will be defending the title which New Zealand won in Melbourne in 2006.
New Zealand has never lost a game at the Commonwealth Games since the sport was introduced in 1998, and is aiming for its fourth straight gold medal.
It is a bonus for Thomson after he was dropped from the All Blacks after the June internationals, and had made it clear he wanted to be part of the sevens set-up for the Delhi games.
The pair are likely to miss three games for Otago in the ITM Cup against Bay of Plenty, Canterbury and Waikato.
Thomson and Smith are joined by fellow All Blacks Hosea Gear and Zac Guildford in the side.
The rest of coach Gordon Tietjens' side for the October games in New Delhi comprises eight stalwarts from the world series squad which finished second to Samoa this year.
The side will be captained by Counties Manukau's DJ Forbes.
"My core national squad members have really proved themselves during the world series and earned their spots in the team," Tietjens told New Zealand Press Association.
"We have also been lucky enough to be able to add to that with high calibre and experienced players," he added.
Thomson played in the 2007 world series for Tietjens and Gear a couple of tournaments in 2003.
"Zac Guildford and Ben Smith are new to sevens but they picked it up very quickly in the trials and bring the X-factor.
The four have magnificent skills sets, pace and have played at high level."
Tietjens said the world series had levelled out sevens rugby in the last three or four years so it would be a huge challenge for top seeded New Zealand to continue their unbeaten run at the Games.
Samoa as reigning world series champions, Australia, England and South Africa would also be expected to wheel out some of their big guns for New Delhi.
"Certainly, three or four teams can win the gold medal," he said.
NZ Sevens squad for Commonwealth Game:
Toby Arnold (Bay of Plenty), Kurt Baker (Taranaki), Tomasi Cama (Manawatu), DJ Forbes (captain, Counties Manukau), Hosea Gear (Wellington), Zac Guildford (Hawke's Bay), Tim Mikkelson (Waikato), Lote Raikabula (Manawatu), Ben Smith (Otago), Ben Sounness (Taranaki), Sherwin Stowers (Counties Manukau), Adam Thomson (Otago).
Stand-by players are Solomon King (Bay of Plenty) and Julian Savea (Wellington).
