Starlette 1.0 RC

Starlette 1.0 RC, released in February 2026, is the first release candidate for Starlette 1.0. This version removes features deprecated in the 0.x branch and stabilizes the ASGI API. FastAPI and other ASGI frameworks benefit directly.

Notable Changes

python 
from starlette.applications import Starlette
from starlette.routing import Route
from starlette.responses import JSONResponse

async def homepage(request):
    return JSONResponse({'version': '1.0rc1'})

app = Starlette(
    routes=[Route('/', homepage)],
)

# Removed in 1.0:
# - GraphQLApp (use strawberry or ariadne)
# - on_startup/on_shutdown (use lifespan)
# - Synchronous Request.body()

Sources