Claude Opus is building more than half of the new AI-made games on Playgama, but OpenAI’s Astra is making the ones players like most.
That’s according to the company’s first AI Game Index, which tracks 4,200 games published between September 22 and October 21.
The index, which Playgama says is the industry’s first of its kind, ranks AI models and coding agents on playtime, player likes and share of new games across games built on its Playgama Sandbox platform, according to the company. It says it’s measuring what benchmarks can’t: whether anyone wants to play what a model builds. The data will update daily.
Claude Opus powers 54% of new games, according to the index. Second to Opus is OpenAI’s Sol at 11%, then Claude Sonnet at 8%, OpenAI’s Astra at 3.8%, Claude Fable at 3%, Gemini Pro at 1.9%, Gemini Flash at 1.8% and lastly DeepSeek at 1.6%. According to Playgama’s press release, Opus climbed up to 62% last week while Sol fell to 8%.
Players are responding differently than developers. The report stated that players like games built on OpenAI’s Astra the most, with a median 65 likes per 1,000 plays. Claude Sonnet and OpenAI’s Sol tie for second at 58, then DeepSeek at 42, Gemini Pro at 40, Claude Opus at 39, Claude Fable at 30 and Gemini Flash at 30. Opus ranks sixth of eight rated models, while Astra’s median is about 67% higher than Opus’s.
Astra-built games also appear to be holding players attention for the longest amount of time, at a median 4 minutes 58 seconds per play. Next, DeepSeek comes second at 4:32, followed by a tie between Claude Opus and OpenAI’s Sol at exactly 4:30. Following that, Gemini Pro comes in at 4:25, Claude Sonnet at 3:56, Claude Fable at 3:45 and Gemini Flash at 3:28. For the purposes of the index, a “play” is considered to be a session of at least 30 seconds or more.
This gap between developer and player preferences also seems to be appearing in the coding tools, according to Playgama. The median Codex-built game earns 65 likes per 1,000 plays, versus just 43 for Claude Code. Additionally, the release stated that the open-source agent OpenCode is behind 1.6% of games and leads rated tools on playtime at 5:14.
Dmitry Kachmar, Playgama’s founder, specified that the index should be read as a snapshot, rather than a fully fledged picture.
“Look at the index as a thermometer, not a judge,” Kachmar said. “A year ago, making a game required a team and months of work. Now, one person can build a game with an AI agent in one evening.”
Playgama stated in their release that these rankings often evolve frequently, and very quickly. For example, Astra peaked at 16% to 17% of daily new games back in late September, yet their percentage has remained under 5% a day since October 2. As Kachmar explained, every AI lab is shipping updates constantly, which is what causes the hyper-frequent, daily updates to the index.
In their press release, Playgama detailed the methodology behind the index. The index counts each game on the day it’s published to Playgama Sandbox. Developers each indicate the AI agent and model they used. The studied figures are medians, rather than averages, so one hit can’t carry a model. A game is counted after 20 plays, and a model is rated after 15 measured games. The likes per 1,000 plays figure is made up of all-time likes divided by all-time plays, times 1,000.
While the index’s coverage of AI game rankings is rather extensive, there are some limitations to its accuracy. The index covers games published on Playgama’s own platform, and the model information is self-reported by developers. The index just reflects one platform’s data, not the entire market’s. Additionally, measuring the number of likes only demonstrates what players have been reacting to, which is not necessarily a reflection of the game’s quality as a whole.
Playgama, founded in 2023, connects developers, publishers, advertisers and players. In 2026, the platform recorded more than 4,000 developers using its core services. Playgama raised over $3 million in venture funding in 2024.
Creators can enter the index by publishing to Playgama Sandbox and tagging their model and agent. Games count toward market share from day one and enter the playtime and like rankings after 20 plays. The index is updated daily at playgama.com/ai-game-index.