Agent infrastructure · sandboxes
Which sandbox spins up fastest?
21Providers/100 per modeRuns per provider/2026-07-24Measured/daily · open CICadence
Every coding agent needs an isolated box to execute in — and cold-start latency is the tax on every task. This ranks sandbox providers by ComputeSDK's composite score — cold-start latency percentiles blended with reliability — re-measured daily in their open CI.
Sandboxes· ranked by composite score
source: ComputeSDK benchmarks ↗#ProviderCompositeMedianP95Burst ×100StaggeredSuccess$/hr
1Isorun99.540 ms60 ms44 ms14 ms100%—2Northflank97.9200 ms220 ms198 ms65 ms100%—3Lightning AI97.3260 ms290 ms260 ms164 ms100%—4Declaw97.2250 ms320 ms253 ms48 ms100%—5CreateOS95.8400 ms470 ms396 ms49 ms100%—6Blaxel95.7400 ms480 ms404 ms227 ms100%$0.0837Modal93.5600 ms680 ms602 ms477 ms100%$0.128Vercel92.8540 ms920 ms543 ms381 ms100%$0.159Cloud Run92.0600 ms1.08 s598 ms540 ms100%—10Archil90.4780 ms1.17 s785 ms121 ms100%—11Superserve89.2900 ms1.34 s901 ms269 ms100%—12E2B87.51.05 s1.32 s1.05 s778 ms99%$0.08313Tensorlake86.91.25 s1.39 s1.25 s732 ms100%—14Daytona76.01.88 s3.10 s1.88 s821 ms100%$0.08315Runloop75.51.94 s3.16 s1.94 s484 ms100%$0.1616Upstash75.01.77 s3.28 s1.77 s294 ms100%—17Tenki50.31.62 s14.94 s1.62 s978 ms100%—18Cloudflare49.94.59 s5.57 s4.59 s3.70 s100%$0.09019Beam41.8410 ms650 ms0 ms180 ms44%—20OpenComputer24.06.00 s25.32 s6.00 s2.18 s100%—21CodeSandbox21.46.54 s9.76 s6.54 s2.39 s100%$0.074est
How it's measured
The composite is ComputeSDK's headline score: cold-start latency percentiles blended with reliability, so a provider can't top the board on a degenerate run. TTI = create a sandbox, execute a command, wait for the answer. Burst (100 at once) and staggered (100 at 200 ms intervals) medians come from the raw repo data; prices normalized to 1 vCPU + 2 GB.
Independent & re-run daily
Run by ComputeSDK (a provider-neutral SDK) in public GitHub CI — raw per-iteration results are committed to the open repo, and this page reads them straight from it. Related: the sandboxes agents store to and the browsers they drive, on the Storage and Browser boards.