diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 373179ef9..845203228 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "5.12.2"
+  ".": "5.12.3"
 }
diff --git a/.stats.yml b/.stats.yml
index 1c85ee4a0..a098c3d40 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 111
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-6a1bfd4738fff02ef5becc3fdb2bf0cd6c026f2c924d4147a2a515474477dd9a.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-9cadfad609f94f20ebf74fdc06a80302f1a324dc69700a309a8056aabca82fd2.yml
 openapi_spec_hash: 3eb8d86c06f0bb5e1190983e5acfc9ba
-config_hash: a67c5e195a59855fe8a5db0dc61a3e7f
+config_hash: 68337b532875626269c304372a669f67
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61cb0a53e..74e27ca61 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## 5.12.3 (2025-08-11)
+
+Full Changelog: [v5.12.2...v5.12.3](https://github.com/openai/openai-node/compare/v5.12.2...v5.12.3)
+
+### Chores
+
+* **internal:** update comment in script ([2488faf](https://github.com/openai/openai-node/commit/2488faf387da1c9bd7565d4bb5aded7bb53b8799))
+* update @stainless-api/prism-cli to v5.15.0 ([db44a7d](https://github.com/openai/openai-node/commit/db44a7d2afa4e0330f4981c106f9abf2fd4ab432))
+
 ## 5.12.2 (2025-08-08)
 
 Full Changelog: [v5.12.1...v5.12.2](https://github.com/openai/openai-node/compare/v5.12.1...v5.12.2)
diff --git a/jsr.json b/jsr.json
index b53af315c..405ff03be 100644
--- a/jsr.json
+++ b/jsr.json
@@ -1,6 +1,6 @@
 {
   "name": "@openai/openai",
-  "version": "5.12.2",
+  "version": "5.12.3",
   "exports": {
     ".": "./index.ts",
     "./helpers/zod": "./helpers/zod.ts",
diff --git a/package.json b/package.json
index 3c0072eb5..4cfa7b82d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openai",
-  "version": "5.12.2",
+  "version": "5.12.3",
   "description": "The official TypeScript library for the OpenAI API",
   "author": "OpenAI <support@openai.com>",
   "types": "dist/index.d.ts",
diff --git a/scripts/mock b/scripts/mock
index d2814ae6a..0b28f6ea2 100755
--- a/scripts/mock
+++ b/scripts/mock
@@ -21,7 +21,7 @@ echo "==> Starting mock server with URL ${URL}"
 
 # Run prism mock on the given spec
 if [ "$1" == "--daemon" ]; then
-  npm exec --package=@stainless-api/prism-cli@5.8.5 -- prism mock "$URL" &> .prism.log &
+  npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock "$URL" &> .prism.log &
 
   # Wait for server to come online
   echo -n "Waiting for server"
@@ -37,5 +37,5 @@ if [ "$1" == "--daemon" ]; then
 
   echo
 else
-  npm exec --package=@stainless-api/prism-cli@5.8.5 -- prism mock "$URL"
+  npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock "$URL"
 fi
diff --git a/scripts/test b/scripts/test
index 2049e31b0..7bce0516b 100755
--- a/scripts/test
+++ b/scripts/test
@@ -43,7 +43,7 @@ elif ! prism_is_running ; then
   echo -e "To run the server, pass in the path or url of your OpenAPI"
   echo -e "spec to the prism command:"
   echo
-  echo -e "  \$ ${YELLOW}npm exec --package=@stoplight/prism-cli@~5.3.2 -- prism mock path/to/your.openapi.yml${NC}"
+  echo -e "  \$ ${YELLOW}npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock path/to/your.openapi.yml${NC}"
   echo
 
   exit 1
diff --git a/src/version.ts b/src/version.ts
index e2fff1943..573cbd5e5 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '5.12.2'; // x-release-please-version
+export const VERSION = '5.12.3'; // x-release-please-version