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Documentation Index

Fetch the complete documentation index at: https://docs.coreweave.com/llms.txt

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Run Python functions in sandboxes without writing command strings: 
from cwsandbox import Sandbox, SandboxDefaults

with Sandbox.session(SandboxDefaults()) as session:
    @session.function()
    def add(x: int, y: int) -> int:
        return x + y

    result = add.remote(2, 3).result()  # 5
Parallel execution with .map(): 
@session.function()
def square(x: int) -> int:
    return x * x

refs = square.map([(1,), (2,), (3,)])
results = [r.result() for r in refs]  # [1, 4, 9]
For serialization modes, .local() testing, and more, see the Remote functions guide.
Last modified on April 21, 2026