diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b3935d4..8247ab84 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.2] - 2026-04-25
+
+### Added
+- **`/model` opens a Pro/Flash + thinking-effort picker (#39).** Typing `/model` with no argument now pops a two-pane modal: model on the left (`deepseek-v4-pro` flagship, `deepseek-v4-flash` fast/cheap, plus a "current (custom)" row when the active id isn't one of the listed defaults), and thinking effort on the right. Tab/←/→ swaps panes, ↑/↓ moves within the focused pane, Enter applies both selections, Esc cancels. The effort pane intentionally exposes only **Off / High / Max** because [DeepSeek's Thinking Mode docs](https://api-docs.deepseek.com/guides/reasoning_model) state `low`/`medium` are mapped to `high` server-side and `xhigh` is mapped to `max` — the legacy variants stay valid in `~/.deepseek/settings.toml` for back-compat, the picker just doesn't surface them. Apply path persists `default_model` and `reasoning_effort` to settings, forwards `Op::SetModel` + `Op::SetCompaction` to the running engine so the next turn picks up the change without a restart, and resets the per-turn token gauges (cache, replay) so the footer numbers reflect the new model. `/model <id>` keeps working unchanged for power users.
+
 ## [0.5.1] - 2026-04-25
 
 ### Added
diff --git a/Cargo.lock b/Cargo.lock
index 8e621a58..6a3a3ce0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -806,7 +806,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-agent"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "deepseek-config",
  "serde",
@@ -814,7 +814,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-app-server"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "axum",
@@ -837,7 +837,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-config"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "dirs",
@@ -848,7 +848,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-core"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -867,7 +867,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-execpolicy"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "deepseek-protocol",
@@ -876,7 +876,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-hooks"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -890,7 +890,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-mcp"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "deepseek-protocol",
@@ -900,7 +900,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-protocol"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "serde",
  "serde_json",
@@ -908,7 +908,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-state"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -920,7 +920,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-tools"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -933,7 +933,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-tui"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "arboard",
@@ -987,7 +987,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-tui-cli"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1005,7 +1005,7 @@ dependencies = [
 
 [[package]]
 name = "deepseek-tui-core"
-version = "0.5.1"
+version = "0.5.2"
 
 [[package]]
 name = "deranged"
diff --git a/Cargo.toml b/Cargo.toml
index 6d4bd483..9acd34e7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ default-members = ["crates/cli", "crates/app-server", "crates/tui"]
 resolver = "2"
 
 [workspace.package]
-version = "0.5.1"
+version = "0.5.2"
 edition = "2024"
 license = "MIT"
 repository = "https://github.com/Hmbown/DeepSeek-TUI"
diff --git a/npm/deepseek-tui/package.json b/npm/deepseek-tui/package.json
index 15fd2d7e..af045fa8 100644
--- a/npm/deepseek-tui/package.json
+++ b/npm/deepseek-tui/package.json
@@ -1,7 +1,7 @@
 {
   "name": "deepseek-tui",
-  "version": "0.5.1",
-  "deepseekBinaryVersion": "0.5.1",
+  "version": "0.5.2",
+  "deepseekBinaryVersion": "0.5.2",
   "description": "Install and run deepseek and deepseek-tui binaries from GitHub release artifacts.",
   "author": "Hmbown",
   "license": "MIT",