CodeSandbox vs Kosa8

Sandbox Benchmark Comparison · Updated November 13, 2026

CodeSandbox
Faster in
0of 1 benchmark
#21 of 33 in Sandbox Provider Rating
vs
Kosa8
Faster in
1of 1 benchmark
#33 of 33 in Sandbox Provider Rating

Kosa8 was faster in the only sandbox benchmark with a speed verdict.

Head to head

  • Burst TTI
    Time to interactive · lower is better
    Kosa8 faster33.8x
    CodeSandbox
    61.77s88%
    Kosa8
    1.83s
  • DAX
    Total workload time · lower is better
    No verdict
    CodeSandbox
    —
    Kosa8
    —

Burst TTI

November 13, 2026
Full leaderboard

CodeSandbox

88% success
Median
61.77s
p95
75.49s
p99
76.89s
CodeSandbox Burst TTI results

Kosa8

100% success
Median
1.83s
p95
2.50s
p99
3.14s
Kosa8 Burst TTI results

DAX

November 13, 2026
Full leaderboard

CodeSandbox

0% success

No measured time in this run.

CodeSandbox DAX results

Kosa8

0% success

No measured time in this run.

Kosa8 DAX results
Work at CodeSandbox or Kosa8? See where you stand every day, with full run logs, not just on benchmark Friday.Get stealth benchmarks →

Methodology

  • One workload, every provider. The same script, payload, and model hit every provider, addressed the way its own API expects. Nobody gets a tuned or special path.
  • Repeated on a schedule. Every suite runs many iterations per provider, automated on a recurring schedule, so results reflect steady state rather than one lucky request.
  • Raw results published. Every run is committed as JSON to the public benchmarks repo, next to the code that produced it. Nothing is cherry-picked or held back.
  • How this comparison is built. Each benchmark compares the two providers' medians; results within 5% count as roughly even. A comparison is published when both providers have at least one successful run in the same benchmark from the last 30 days. A benchmark only gets a verdict when both providers completed at least 50% of its runs. If a provider’s latest run of a benchmark failed, its most recent successful run from that window is used instead.
Read the full methodology →Raw results on GitHub ↗

Frequently asked questions

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Kosa8 was faster in the only sandbox benchmark with a speed verdict. In Burst TTI (November 13, 2026), Kosa8 had a median time to interactive of 1.83s versus 61.77s for CodeSandbox, 33.8x faster.

Both providers have results in 2 sandbox benchmarks: Burst TTI and DAX. 1 of them has a speed verdict.

Success rates in the latest runs: Burst TTI: CodeSandbox 88%, Kosa8 100%; DAX: CodeSandbox 0%, Kosa8 0%. DAX has no speed verdict because CodeSandbox and Kosa8 completed fewer than half of their runs.

Burst TTI and DAX results are from November 13, 2026.