Google Ships Gemini Spark to Pro Subscribers as Musk Pitches Grok 4.5 on Price

The agent platform war is splitting along two axes — Google betting on always-on background execution, xAI betting on speed and cost — with both openly benchmarking against Fable.

Google is widening the rollout of its personal background agent. @GeminiApp confirmed that "Gemini Spark is now also starting to roll out to Google AI Pro subscribers in the U.S." Spark's pitch is persistent, background execution — an agent that works on your behalf between sessions rather than only when prompted — which puts it squarely in the always-on category that the Claude workflows in this issue are also chasing.

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