Before choosing a hosted agent runtime, find out what it bills while your agent waits. A request-driven agent may spend substantial time waiting for an LLM, tool, API, database, or user; depending on the runtime, CPU charges may stop during that wait, while memory, background activity, storage, and network charges continue. The right choice depends on the agent’s workload and state requirements—not a single “idle cost” figure.
What happens to your bill while an agent waits?
“Idle” can mean different things to a runtime’s billing system. Separate the resources and charges that can accrue:
- CPU: Does CPU billing stop during I/O waits, such as waiting for an LLM response or tool call?
- Memory: Does memory remain billable during the wait, have a minimum billed amount, or get reclaimed after a period?
- Background activity: Do timers, health checks, polling, or other processes keep the workload active?
- Other charges: Are storage, network transfer, model calls, or tool services billed separately from runtime compute?
A runtime can reduce CPU charges during waits without making the whole session free. Check the billing rules for the specific resource type, configuration, and region you plan to use.
How AWS AgentCore handles idle time
Amazon Bedrock AgentCore Runtime offers two compute types: serverless microVMs and Instances running on AWS-managed EC2 infrastructure in your account. AWS describes dedicated microVM isolation per user session and flexibility across frameworks and models. The compute choice affects both lifecycle and billing.
Recommended Free Tools
#1 Best Overall
- 【Ryzen 5 3500U Processor】KAMRUI Essenx E2 Mini PC is equipped with AMD Ryzen 5 3500U (4-cores/8-threads, up to 3.7GHz) with integrated Radeon Vega 8 Graphics(1200MHz, 8 Core). The 3500U CPU operates at a base frequency of 2.1 GHz and a Boost frequency of 3.7 GHz. This DDR supports upgradable up to 32GB, SSD supports up to 2TB.(NOT INCLUED), KAMRUI E2 3500U Mini PC is ideal for light office work and home entertainment. KAMRUI E2 3500U is more than 35% more powerful and smoother in operation than the Intel N150, 33% faster than Intel N95, 28% performance boost over Intel i3-10110U, and 42% stronger processing power than AMD Ryzen 3 3200U.
- 【16GB DDR4 & 256GB SSD】The KAMRUI E2 mini computers is equipped with 16GB DDR4(Expandable up to 32GB) for faster multitasking and smooth application switching. 256GB M.2 SSD ensures fast startup times,fast file transfers and plenty of storage space,eliminating slow loading times and ensuring fast responsiveness.Storage space can RAM supports up to 32 GB, SSD supports up to 2TB (Not included)make file storage easier.
- 【4K Dual Display & USB 3.2 Type-A Port】KAMRUI E2 3500U mini desktop pc is equipped with an HDMI 2.0+DP 1.4 interfaces for faster transmission, Support Dual 4K@60Hz Display, E2 mini desktop computers is ideal for visual home entertainment, home office, conference rooms, etc. USB3.2 Gen1 Type-A Port×2 with a transfer speed of up to 5Gbps (10 times faster than USB 2.0) for efficient data transfer. The RJ45 1000M Gigabit Ethernet Port ensures a stable network connection.
- 【WiFi+Bluetooth stable connection】The Kamrui E2 micro pc have reliable and stable wireless connection, open websites in seconds, watch movies without buffering and download files smoothly, connect your monitor from WiFi or Ethernet, use a wireless keyboard and mouse through bluetooth, which will be powerful workstation for you.
- 【Versatile Ports】This KAMRUI E2 Small pc is equipped with HDMI 2.0×1(4K@60Hz)、DP1.4×1(4K@60Hz)、Gigabit Ethernet Port (RJ45, 10/100/1000Mbps) ×1、USB3.2 Gen1 Type-A Port×2（5Gbps）、USB2.0 Type-A Port×2、3.5mm Audio Jack ×1、DC In ×1、Power Button ×1
MicroVM: request-driven or intermittent work
AWS says microVM CPU scales to zero during I/O waits, including waits for LLM responses, tool or API calls, and database queries. Its pricing page qualifies the claim that I/O-wait and idle time is free: that applies only “if no other background process is running.” CPU behavior is therefore not a guarantee that every charge stops during a wait.
On the pricing page, AWS lists per-second billing with a one-second minimum and a minimum billed memory amount of 128 MB; billing includes system overhead. Runtime v2 automatically reclaims idle memory after 120 seconds. Those details matter when a session remains open while CPU is waiting. AWS says microVM sessions can run for up to eight hours. See the AgentCore pricing page and AgentCore Runtime documentation for current terms and behavior.
AWS publishes a figure of 30–70% of agent workload time spent in I/O wait. This is AWS’s general characterization, not an independent measurement or a prediction for a particular agent. Your own wait fraction may differ.
Rank #2
- 【Great power in a small computer】Get fast performance from the AMD Ryzen 5 3500U CPU (2.1GHz-3.7GHz, 4 Cores 8 Threads) inside this mini pc, TDP 15W up to 25W. It's perfect for all your home office and business use, like daily computing, web browsing, and smooth media streaming. This small desktop computer handles everyday tasks easily and quietly.
- 【Work on many things at once with lots of storage】This mini PC comes with 16GB of fast DDR4 RAM (expandable up to 32GB), allowing you to smoothly run multiple programs, dozens of browser tabs, and large files all at once. It also features a spacious 512GB NVMe SSD that provides ample storage and delivers dramatically faster boot-ups, app launches, and file transfers compared to a traditional hard drive.
- 【See everything clearly on one or two 4K screens】Connect one or two monitors for more space to work or play. Dual HDMI ports on this mini pc support super sharp 4K Ultra HD video. It's great for doubling your work area for business or watching movies in high definition.
- 【Fast modern connections in a tiny box】Enjoy a better and more stable internet connection with the latest WiFi 6. Use Bluetooth 5.3 to connect wireless headphones, keyboards, and mice without wires. This small pc is very compact to save desk space and has extra USB ports (USB 2.0×2, USB 3.0×2, Type-c 2.0×1, Type-c 3.2 full featured×1, HDMI×2) for your printer, webcam, or other computer accessories.
- 【Reliable Warranty and Support】We provides 1 year warranty for each Mini computers. So you don't need to worry about any product problems. If you have any questions about the product, please contact our customer service, we will provide 24-hour professional technical support and serve you at any time.
Instances: persistent workloads
For AgentCore Instances, AWS says billing covers the underlying EC2 instance while it runs, plus an AgentCore management fee. Billing begins at provisioning and ends when the instance is stopped or terminated, with an approximately one-minute minimum. EC2 pricing agreements apply to the compute portion, not the AgentCore fee. Persistent EBS storage and network transfer may also be billed separately. AWS says Instances support sessions of up to 14 days.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →This is a different cost shape from CPU scaling to zero during I/O waits. For an always-on agent, account for the instance’s running time and management fee, even when the agent is waiting. Consult the current pricing page for applicable rates and details.
Runtime v2 memory and baseline pricing
AWS’s Runtime v2 announcement says memory is loaded on demand and reclaimed when released; the platform snapshots an initialized container environment and restores instances from that snapshot. AWS says that a higher memory rate may be offset for many agents by a smaller billed memory footprint. That is a vendor claim, not an independent cost comparison. The announcement described committed-baseline pricing for steady, always-active sessions as a coming option; check the AWS announcement and current pricing materials for rollout status and rates.
Rank #3
- 【AMD Ryzen 3 5300U CPU: Outperforms N150 & 3500U】 BOSGAME E5 mini PC is powered by the TSMC 7nm FinFET architecture AMD Ryzen 3 5300U processor (4 Cores, 8 Threads, up to 3.8GHz boost, 6MB total cache). Compared to low-end Intel N150 or 3500U chips which only have 4 single threads and throttle under load, the 5300U delivers over 30% faster multi-core speed. Run 30+ browser tabs, large Excel sheets, and Zoom meetings simultaneously without system lag.
- 【8GB DDR4 RAM & 256GB NVMe SSD Storage】 Installed with high-speed 8GB DDR4 dual-channel memory and a fast 256GB M.2 2280 SSD, eliminating slow boot times and application loading delays. To accommodate growing data requirements, the upgradeable hardware design features dual SODIMM slots that allow you to expand memory up to 64GB RAM, ensuring smooth operation during heavy multitasking.
- 【High-Capacity Dual M.2 SSD Storage Expansion】 Never worry about running out of space for your business files. In addition to the pre-installed 256GB system drive, the motherboard houses an extra empty internal M.2 2280 NVMe PCIe 3.0 slot. This allows you to easily add a second solid-state drive for up to an additional 2TB of storage capacity (upgrades not included) without needing to remove or reinstall the original operating system.
- 【Radeon 6-Core Graphics & Triple 4K Displays】 Integrated with official AMD Radeon Graphics (6 Graphics Cores, 1500 MHz frequency) for casual gaming, photo editing, and crisp 4K media decoding. Featuring 1x HDMI 2.0 port, 1x DisplayPort, and 1x Full-Function Type-C port, the E5 outputs true 4K@60Hz resolution to three monitors at once. This multi-screen setup eliminates constant window-switching for traders, programmers, and office workers.
- 【Dual 2.5GbE LAN Ports for Advanced Networking】 Experience fast wired network transmission speeds up to 2500Mbps without lagging or buffering. The integration of dual 2.5 Gigabit Ethernet ports (powered by Realtek RTL8125 controller) makes this compact computer an exceptional hardware choice for tech enthusiasts. Easily configure it into software routers, hardware firewalls (pfSense, OpnSense), home NAS servers, or local homelabs.
AWS’s Runtime documentation says the service aligns CPU billing with active processing, typically eliminating charges during I/O waits while maintaining session state. Treat that as a description of CPU billing behavior, not as a claim that memory or associated services are always free.
Which Cloud Run resource fits your agent?
Google Cloud’s agent-hosting guidance distinguishes four Cloud Run resource types by workload shape. Its description of Services says they are “Best for stateless, request-driven agents that handle variable user traffic, benefit from autoscaling, and can scale to zero when idle.” Scaling to zero describes the resource’s behavior; it does not establish the total bill for a particular configuration or workload.
| Cloud Run resource | Workload it fits | Idle or lifecycle consideration |
|---|---|---|
| Services | Stateless, request-driven agents with variable traffic, such as chatbot APIs and web API backends | Can autoscale to zero when idle |
| Instances | Dedicated, stateful, always-on singleton loops, such as personal agents that need VM-like lifecycle state commands | Designed for an always-on lifecycle rather than request-driven scale-to-zero behavior |
| Worker pools | Distributed background agents consuming queue tasks, such as Kafka or Pub/Sub workloads without public HTTP endpoints | Background work is the purpose of the resource; assess the chosen billing configuration rather than assuming idle periods are free |
| Jobs | Run-to-completion workflows, such as batch evaluation, large-scale ingestion, or scheduled synchronization | Consider execution duration and schedule, not just time waiting for an individual response |
Google’s Cloud Run agent-hosting documentation explains these workload mappings. Compare the specific resource and its billing configuration before estimating costs; the resource descriptions alone do not supply a total-cost comparison.
Rank #4
- Office Gaming Mini PC - UPGRADED GMKtec Nucbox M5 Ultra Series is equipped with the powerful AMD Ryzen 7 7730U processor, 8 Cores/16 Threads, Base 2.00GHz (Power Saving Quiet Mode) with Turbo Boost up to 4.50GHz (Performance Mode) in BIOS settings, Based on the ZEN 3+ architecture, this small but powerful mini pc delivers satisfying results in productivity, office work, and gaming. 35% Performance increase over AMD Ryzen 5 7430U/ Ryzen 7 5700U, 5600U, 5560U, 5500U.
- 32GB DDR4 RAM & 512GB PCIe SSD - Installed with DDR4 32GB RAM Dual Channel (2x16GB), the Nucbox M5 Plus mini pc support expansion to 64GB RAM. Featured with 512GB M.2 2280 PCIe 3.0 SSD, support dual slot expansion to 4TB SSD. (Upgrades not included)
- DUAL NIC LAN 2.5G RJ45 - Fast Network Speeds: Enjoy up to 2500Mbps data transmission speed without worrying about lagging. Ideal for working, gaming, and surfing the internet. Great for Untangle, Pfsense or as a server office PC.
- Mini Desktop Computer with 4K Triple Screen Display - Nucbox M5 Ultra integrates AMD Radeon Graphics 8 Cores 2000 MHz GPU to deliver powerful graphics processing power to easily handle the demands of complex design software, 4K@60Hz UHD video editing, and playback. It can connect to 3 display screens simultaneously.
- Fast Internet WiFi 6E + BT5.2 Connection - GMKtec Mini PC with WiFi-6E Wireless, have 2.5G/5G/6G triple band, more faster and lower latency. Bluetooth 5.2 allowing you more quickly to connect other wireless devices (headset, mouse, keyboard, etc.) Interface features 2*USB3.2 ports, 2*USB2.0 ports, 1*HDMI 2.0 port(4K@60Hz), 1*USB-C port(PD/DP/DATA), 1*DP Port, 1*Audio 3.5mm (HP&MIC), 1*DC Power Port.
Choose a runtime by workload, not by the word “idle”
Request-driven agent
If requests arrive intermittently and the agent can resume from a request or session, a scale-to-zero service or a consumption-priced runtime may be a fit. Confirm which resources remain billable during waits and whether startup latency after inactivity is acceptable.
Always-on singleton loop
If one agent must remain continuously available or preserve a live process, compare an always-on instance against a scale-to-zero design. Include the running instance cost and any management fee, then weigh those costs against the operational value of persistent state and avoiding cold starts.
Queue consumer or scheduled workflow
A queue consumer is doing background work even if it has no public HTTP endpoint. Match it to a worker-pool or other background-work resource and check whether polling or other background processes keep compute active. For run-to-completion work, compare job execution time and schedule rather than treating the entire workflow as an idle session.
Best Value
- WHY CHOOSE CORE I3-10110U - Better single-core performance: The Core i3-10110U has a higher peak boost clock (4.1 GHz) compared to the Ryzen 3 4300U and the Intel Alder Lake N150 series, making it better for tasks that rely on fast single-core performance (e.g., web browsing, office apps). Better multi-thread performance via Hyper-Threading: the Core i3-10110U offers better performance in multi-threaded workloads compared to the Ryzen 3 4300U, especially for light productivity work and multitasking.
- 16GB RAM MEMORY & 512GB SSD STORAGE - GMKtec Nucbox G3 PRO mini pc is prebuilt with 16GB DDR4 RAM SO-DIMM DUAL CHANNEL, you will enjoy a speedier experience with Built-in 512GB M.2 Hard Drive. Our mini desktop pc boots up in seconds, work on multiple browser tabs, software applications and quickly transfers files. There is a primary slot and secondary expansion storage. Primary slot is M.2 2280 PCIE/SATA and secondary slot is M.2 2242 SATA .
- RICH INTERFACE - Nucbox core i3 mini computer is equipped with USB 3.2*4,up to 5Gbps/S, HDMI(4K@60Hz)×2, 3.5mm Audio Jack. Supports WiFi 6, and Gigabit Ethernet RJ45 2.5GbE network connectivity, Bluetooth 5.2. This Mini PC supports multiple device connection and can be used with servers, monitoring equipment, office equipment, displays, projectors, televisions, etc.
- 4K DUAL SCREEN DISPLAY - Mini desktop computer is equipped with upgraded Intel Graphics(max 1000MHz), supports 4K video playback and AV1 decoding, connect the pc with a projector as a home theatre, enjoy a variety of entertainments. Two HDMI 2.0 ports allows you to multi-task efficiently on two 4K@60Hz displays.
- UPGRADED COOLING FAN - The G3 PLUS has upgraded the cooling fan to reduce fan noise and thermals. We are using an upgraded thermal paste as well to help reduce heat on the CPU.
Build an estimate that includes more than CPU
There is no universal idle-cost winner in the available provider documentation: it does not give an independent cross-provider benchmark or a total-cost comparison for a defined agent workload. Estimate each candidate using your expected usage and the provider’s current regional rates.
- Measure or estimate active CPU time and the share of time spent waiting.
- Estimate the memory footprint and how long it remains billed, including minimums or reclamation delays.
- Account for background tasks that may prevent the runtime from treating the process as idle.
- Add artifact or container-image storage, persistent volumes, network transfer, and any runtime management fee.
- Include model and tool charges outside runtime compute.
- For always-on usage, compare the instance-hour total and management fee with consumption billing using measured utilization and required session lifetime.
- Check concurrency, per-session isolation, accelerator needs, regional availability, startup latency, and state persistence.
Prices and service behavior can change. Verify current regional rates, billing minima, and rollout details on the linked provider pages before committing to a design.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
