diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5afb37f..c9f55f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## v1.0.0 — 2026-03-17
+
+Stable release. Tracks upstream Python SDK v2.0.4.
+
+No API changes from v0.2.0. This release signals that the SDK surface is
+stable and follows Go module semver conventions — breaking changes will only
+occur in future major versions.
+
 ## v0.2.0 — 2026-03-17
 
 Sync with upstream Python SDK v2.0.4. Upstream reference changed from OpenAPI
diff --git a/README.md b/README.md
index 7fe1874..6b6e7f6 100644
--- a/README.md
+++ b/README.md
@@ -219,6 +219,10 @@ if err != nil {
 This SDK tracks the [official Mistral Python SDK](https://github.com/mistralai/client-python)
 as its upstream reference for API surface and type definitions.
 
+| SDK Version | Upstream Python SDK |
+|-------------|---------------------|
+| v1.0.0 | v2.0.4 |
+
 ## License
 
 [MIT](LICENSE)
diff --git a/mistral.go b/mistral.go
index 4fff1da..d55bc5a 100644
--- a/mistral.go
+++ b/mistral.go
@@ -6,7 +6,7 @@ import (
 )
 
 // Version is the SDK version string.
-const Version = "0.2.0"
+const Version = "1.0.0"
 
 const (
 	defaultBaseURL = "https://api.mistral.ai"