Google has heard back from a TPU in space. Its Project Suncatcher prototype satellite answered a prompt this week, which Google calls the first AI response from a data-centre-class chip in orbit.
The test was simple: ask the on-board Gemma 4 open model for a haiku about being in space. The reply came down as the satellite passed over Svalbard in Norway, and it works as a proof that the hardware boots, runs a model and talks to the ground.
Three weeks of commissioning
Google said in a blog post that the satellite launched on 1 October. The weeks after launch went on checkout work: the host computer and TPU trays were switched on and small machine-learning jobs were run, and only then was the prompt uplinked during a ground-station pass.
The haiku read: “Blue marble below / Data streams in silent grace / Starlight feeds my core.” Limericks followed, along with prompts asking the payload to describe its own health.
The hard tests are still ahead
Writing a poem is the easy part. Next, Google says, it will test how the TPUs behave under thermal stress and radiation in orbit, which is what decides whether chips like these could ever do useful work off-planet.
If they hold up, the plan moves to a pair of interconnected satellites in 2027. Google frames Suncatcher as a research moonshot, so nothing here points to a product.
