AWS releases Infinity, an open source agent runtime research project
AWS has released Infinity under Apache 2.0 as part of Hydro. The research runtime suspends agents during tool calls and resumes them later.
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Key takeaways
- Infinity is an open source research release under the Apache 2.0 license.
- It is part of Hydro, a collaborative effort between AWS and UC Berkeley.
- The runtime suspends an agent during a tool call and resumes it later.
- AWS says this design supports very lightweight concurrency.
- The project is early research and is being shared for feedback.
What AWS released
AWS says it is releasing Infinity under the Apache 2.0 open source license. The release is part of Hydro, which AWS describes as a collaborative effort with UC Berkeley. The company presents Infinity as a research project, not a finished product.
The post says Infinity re-imagines agent runtimes. It uses ideas from programming languages that suspend and resume asynchronous functions. AWS says the runtime is meant to make concurrent agents extremely lightweight. The release is also framed as an early research effort shared to gather feedback.
How Infinity works
The core idea is simple. When an agent calls a tool, Infinity dispatches the call, saves the conversation, and suspends the agent. When the tool result arrives, the runtime resumes the agent from its saved state.
AWS compares this to stackless coroutines. The post says the runtime starts with an overview of how languages suspend asynchronous functions. It then applies the same pattern to agents. That is the main architectural idea behind Infinity.
This approach changes what needs to stay active while an agent waits. The runtime can pause the agent instead of keeping the whole process running. AWS says that makes it possible to run many agents at once with low overhead.
Concurrency and deployment
AWS gives one concrete example of the runtime's scale. It says 75,000 concurrent agents can fit in the 8 GB of a Raspberry Pi 5. The post uses this example to show how lightweight the runtime can be.
The company also says Infinity can run concurrent agents on standard serverless platforms. In this model, when Infinity suspends an agent during a tool call, the serverless function can end. If a tool call takes days, nothing needs to run while the agent waits.
That is the operational promise of the design. The runtime handles the pause and resume cycle, so waiting does not require continuous execution. AWS presents this as a way to support long-running tool calls without keeping compute active the whole time.
Why the research matters
The post is focused on ideas and architecture. AWS says the rest of the article explains the thinking behind Infinity and how it is built. The release is meant to start a conversation around agent runtimes, not to close it.
Because this is an early research release, readers should treat the claims as part of an experimental system. The source does not describe production guarantees, support terms, or a commercial roadmap. It does, however, clearly state the intended behavior of the runtime and the concurrency model it enables.
Morocco relevance
The source reports no Morocco-specific facts. The global lesson is conditional: if a team needs agents that pause during tool calls, a suspend-and-resume runtime may reduce idle compute.
Bottom line
Infinity is AWS's open source research release for agent concurrency. Its main idea is to suspend agents during tool calls and resume them from saved state later. AWS says that design can support very large numbers of concurrent agents and can work on serverless platforms.
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