diff --git a/README.md b/README.md
index 242d9111..cd4b3083 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ plasma, and Raman frequency combs.
 *A 7.5 fs pulse at 800 nm self-compresses in a helium-filled capillary with a pressure
 gradient to vacuum and emits a resonant dispersive wave at 120–150 nm: spectral and
 temporal evolution along the 1.5 m fibre, and the exit spectrum. Four coupled modes,
-ionisation and plasma included; about half a minute on a laptop.*
+ionisation and plasma included; under ten seconds on a laptop.*
 
 ```python
 from solprop.driver import prop_capillary
diff --git a/changelog.d/beta-status.changed.md b/changelog.d/beta-status.changed.md
new file mode 100644
index 00000000..69ef5423
--- /dev/null
+++ b/changelog.d/beta-status.changed.md
@@ -0,0 +1 @@
+The package classifier is now Development Status 4 - Beta. The interfaces may still change between minor releases.
diff --git a/docs/guide/workflows/luna.md b/docs/guide/workflows/luna.md
index 303ef212..dc4f8fe5 100644
--- a/docs/guide/workflows/luna.md
+++ b/docs/guide/workflows/luna.md
@@ -317,7 +317,7 @@ error.
 - Tabulated modes from any mode solver.
 - Planar guides, including a planar guide resolved across its width, and a line
   geometry of free space.
-- Gas mixtures and steady-flow fills.
+- Steady-flow gas fills.
 - Vector Raman responses.
 - A frequency-dependent electronic response (opt-in, on every backend): optmat's
   whole hyperpolarisability fit evaluated at every quartet's frequencies, where Luna
@@ -331,7 +331,6 @@ error.
 - Coupling one simulation's output field into another (a capillary, a fibre, a gas gap) through coherent field planes, with transport through free space, lenses, apertures, mirrors and spectral optics ([coupling simulations](coupling.md)).
 - Design tools with multi-soliton content, and the inverse design of a capillary's
   pressure and energy for a soliton order, count or largest eigenvalue.
-- Scans on process pools and Slurm clusters.
 - The native backend for multi-core CPUs and GPUs.
 
 ## Validation against Luna
diff --git a/pyproject.toml b/pyproject.toml
index 3afe53c3..aa1bf9ce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ requires-python = ">=3.14"
 dynamic = ["version", "dependencies", "optional-dependencies"]
 classifiers = [
     # 0.x: the interfaces may still change between minor releases.
-    "Development Status :: 3 - Alpha",
+    "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.14",