Development environments / Zhipu Z Managed Agents alternative

A Zhipu Managed Agents alternative

Zhipu Z Managed Agents runs the agent loop, tools and session environments as a managed service. Its default output retention differs from optional system-disk checkpoints, which can preserve installed packages across turns. Compare both paths with the persistent computer layer your own agent would use on Sandbox0.

Start building Compare capabilities ↓

Reviewed 2026-10-18 · Published by the Sandbox0 team

When Zhipu Z Managed Agents fits

Z Managed Agents fits applications wanting managed model/tool loops, events, MCP and skills, prepared environments and scheduled agent runs. Its API and console can reduce the application infrastructure needed to execute multi-step tasks.

When to consider Sandbox0

Consider Sandbox0 when your own compatible agent should keep installed software and system settings with user files on a durable writable RootFS that grows online. You must supply or retain the model integration, agent loop, events, skills and scheduling layer.

Capabilities

Zhipu Z Managed Agents and Sandbox0: what persists?

Feature comparison with documentation and verification status
Capability	Zhipu Z Managed Agents	Sandbox0
Environment and runtime lifetime	Zhipu Z Managed AgentsNot established in this review	Sandbox0ttl and hard_ttl default to 0 (disabled). Configure idle pause and deletion policies for the same persistent sandbox identity; an idle running sandbox still accrues compute charges.Read documentation →
Persistent files	Zhipu Z Managed AgentsOutputs persist by default; optional system-disk checkpoints preserve more files with a bounded retention policy and possible fresh-sandbox fallback.View evidence ↗	Sandbox0The writable RootFS survives successful checkpoints, including software, system configuration, dependencies, and user data.Read documentation →
Whole RootFS	Zhipu Z Managed AgentsOpt-in system-disk snapshots retain /workspace, /tmp and installed packages across turns; this is not the default or an unconditional durability guarantee.View evidence ↗	Sandbox0Persistence extends beyond /workspace to paths such as /usr/local, /etc, and /home. Runtime tmpfs and virtual filesystems are excluded.Read documentation →
Release compute, keep state	Zhipu Z Managed AgentsManaged turn continuation and disk restoration do not establish arbitrary VM execution-state pause/resume.View evidence ↗	Sandbox0Pause compute between tasks; resume on available capacity. Default resume starts fresh processes from the saved filesystem.Read documentation →
Memory and process state	Zhipu Z Managed AgentsThe guide explicitly says checkpoints retain disk, not running processes or memory.View evidence ↗	Sandbox0Experimental memory checkpoints can preserve compatible process state. Use memory: true on both pause and resume on a compatible deployment. A filesystem checkpoint alone does not preserve running processes.Read documentation →

Online RootFS growth

On growth-enabled images, Sandbox0 automatically expands the writable RootFS as free space runs low, within a configured sparse logical ceiling up to 64 TiB. Agent processes keep running. Growth is enabled in the qualified Cloud region; confirm activation for other regions. Existing images and snapshots retain their captured storage geometry. The ceiling is logical capacity, not preallocated host disk.

Zhipu’s optional system-disk checkpoint is broader than output-directory persistence, but the reviewed sources do not establish automatic expansion of the mounted RootFS as free space runs low. Snapshot retention and restoration reliability are separate from Sandbox0’s online-growth contract.

Files while compute is paused

Sandbox0's Files API reads persistent files without resuming compute. Filesystem-only pauses also permit edits; retained-memory pauses are read-only and reject mutations with 409. SSH, SFTP, file watching, and runtime-only mounts require running compute.

See paused file operations →

Outputs persist by default; the system disk is opt-in

/mnt/session/outputs is retained across turns and cataloged for download. /workspace, /tmp and runtime-installed packages are not retained by the ordinary default. Creating a session with x-checkpoint:true enables system-disk snapshots with a one-to-30-day retention setting, defaulting to 30; some resource configurations can imply checkpointing. Stable dependencies can also be declared in Environment packages.

Source 1 ↗Source 2 ↗

Checkpointing preserves disk, with a documented fresh-sandbox fallback

The session guide explicitly excludes running processes and memory. It attempts a disk snapshot after a successful turn and prefers the latest successful snapshot on the next turn; quota or backend failures can instead create a fresh sandbox. The guide therefore warns against treating the checkpoint as the only persistent store. Keep important downloadable artifacts in the output directory.

Source 1 ↗

A model Coding Plan is not the Managed Agents bill

The service uses Open Platform API usage and does not accept Coding Plan quota. Model inference is billed at the selected model’s API rate. Environment and Web Search/Fetch tool fees are temporarily waived through October 31, 2026; this time-limited offer does not establish a permanent free runtime or the price after that date.

Source 1 ↗Source 2 ↗

Pricing

Compare billing models, then price your workload

CPU allocation, memory, billing minimums, disk, plan fees, and supported workload differ. These meters are not equal-performance machine quotes. Confirm region, resource units, and included allowances before estimating a total.

Zhipu Z Managed Agents

Pricing reviewed 2026-10-18

Sandbox and environment fee during current offer: Free through October 31, 2026; Temporary waiver; later rules depend on official announcements.; Rate source ↗
Web Search / Web Fetch tool fee during current offer: Free through October 31, 2026; Model tokens still incur charges; later per-call pricing is not specified here.; Rate source ↗
Model inference: Selected model’s Open Platform API rate; Coding Plan subscription quota cannot be used for Managed Agents.; Rate source ↗

This is Beta billing with a dated waiver, not a universal zero-cost agent session. Confirm applicable inference rates, future environment/tool fees and tenant checkpoint quotas from current announcements and the account bill. No USD conversion or invented post-promotion rate is used.

Check current Zhipu Z Managed Agents pricing ↗

Sandbox0

$0.015/GiB-hour compute (billed by the second at approximately $0.000004167/GiB-second), plus $0.02/GiB-month of retained incremental RootFS and memory checkpoint data. Shared base images and platform recovery retention are excluded; paused sandboxes accrue storage charges only.

Compute / GiB-hour: $0.015
Retained data / GiB-month: $0.02
Paused compute: $0.00

A 4 GiB agent, 100 running hours

$6.00 compute

4 GiB × 100 hours, billed by the second. Keeping 20 GiB of billable incremental data for a full billing month adds $0.40. CPU is derived from memory by the platform; choose a tier that fits your workload.

Understand storage billing →

Before migrating from Zhipu Z Managed Agents

Export output files, Memory Store content, agent/Environment definitions and credential references; identify checkpoint-enabled sessions and remaining retention days.
Port compatible tools to Sandbox0 and implement or retain the model loop, SSE/history recovery, tool permissions, MCP, skills and scheduled tasks.
Test installed packages and configuration outside outputs, full RootFS growth, disk versus process restoration, paused file access and billing after the temporary waiver.

Common questions

Is Sandbox0 a drop-in Zhipu Z Managed Agents replacement?

Evaluate API compatibility and product scope. These products serve different core workflows, so a change may require a different architecture.

Does keeping files also keep a running agent?

Filesystem state and volatile process state are separate. Sandbox0 requires explicit compatible memory checkpoints to preserve running processes; its default filesystem resume starts fresh processes.

Sources and review scope

The Boat team's Battleships directory is the discovery source. References below describe the product and plan discussed on this page. Check current availability, regional terms and billing units before migrating. Where the cited material does not establish a capability or price, the comparison identifies that uncertainty.

Battleships research record ↗docs.bigmodel.cn/cn/managed-agents/sandbox-reference.md ↗docs.bigmodel.cn/cn/managed-agents/create-session.md ↗docs.bigmodel.cn/cn/managed-agents/overview.md ↗docs.bigmodel.cn/cn/managed-agents/faq.md ↗Sandbox0 RootFS capacity →

Related comparisons

Agency Tool Company vs Sandbox0 →Amp Orbs vs Sandbox0 →Bitrise RDE vs Sandbox0 →boxes.dev vs Sandbox0 →Capy vs Sandbox0 →Claw 2 Agent vs Sandbox0 →