diff --git a/coderd/x/chatd/chatprovider/chatprovider_test.go b/coderd/x/chatd/chatprovider/chatprovider_test.go
index 0644550cd6..01e403be6f 100644
--- a/coderd/x/chatd/chatprovider/chatprovider_test.go
+++ b/coderd/x/chatd/chatprovider/chatprovider_test.go
@@ -1123,7 +1123,7 @@ func TestModelFromConfig_BedrockStreamingHeaders(t *testing.T) {
 	got := testutil.TryReceive(ctx, t, requests)
 	require.NoError(t, got.ReadError)
 	require.Equal(t, "/model/us.anthropic.claude-opus-4-6-v1/invoke-with-response-stream", got.Path)
-	require.Equal(t, "application/vnd.amazon.eventstream", got.Accept)
+	require.Empty(t, got.Accept)
 	require.Equal(t, "application/json", got.BedrockAccept)
 	require.Contains(t, got.Authorization, "AWS4-HMAC-SHA256")
 	require.Contains(t, got.Authorization, "x-amzn-bedrock-accept")
diff --git a/go.mod b/go.mod
index dd1e7a0574..20987ae110 100644
--- a/go.mod
+++ b/go.mod
@@ -91,8 +91,8 @@ replace charm.land/fantasy => github.com/coder/fantasy v0.0.0-20260426185602-951
 
 // coder/coder uses a fork of charmbracelet's fork of the Anthropic Go SDK
 // with performance improvements and Bedrock header cleanup.
-// See: https://github.com/coder/anthropic-sdk-go/commits/67514346e0fb
-replace github.com/charmbracelet/anthropic-sdk-go => github.com/coder/anthropic-sdk-go v0.0.0-20260428111347-67514346e0fb
+// See: https://github.com/coder/anthropic-sdk-go/commits/47cab198e449
+replace github.com/charmbracelet/anthropic-sdk-go => github.com/coder/anthropic-sdk-go v0.0.0-20260428122333-47cab198e449
 
 // Replace sdks with our own optimized forks until relevant upstream PRs are merged.
 // https://github.com/anthropics/anthropic-sdk-go/pull/262
diff --git a/go.sum b/go.sum
index c6c869ca3d..7246ace75c 100644
--- a/go.sum
+++ b/go.sum
@@ -314,8 +314,8 @@ github.com/coder/agentapi-sdk-go v0.0.0-20250505131810-560d1d88d225 h1:tRIViZ5JR
 github.com/coder/agentapi-sdk-go v0.0.0-20250505131810-560d1d88d225/go.mod h1:rNLVpYgEVeu1Zk29K64z6Od8RBP9DwqCu9OfCzh8MR4=
 github.com/coder/aisdk-go v0.0.9 h1:Vzo/k2qwVGLTR10ESDeP2Ecek1SdPfZlEjtTfMveiVo=
 github.com/coder/aisdk-go v0.0.9/go.mod h1:KF6/Vkono0FJJOtWtveh5j7yfNrSctVTpwgweYWSp5M=
-github.com/coder/anthropic-sdk-go v0.0.0-20260428111347-67514346e0fb h1:/qJzrmYz+ii329dgoQ1BxtlrhdJvtTkk7UwhrroSohU=
-github.com/coder/anthropic-sdk-go v0.0.0-20260428111347-67514346e0fb/go.mod h1:hqlYqR7uPKOKfnNeicUbZp0Ps0GeYFlKYtwh5HGDCx8=
+github.com/coder/anthropic-sdk-go v0.0.0-20260428122333-47cab198e449 h1:X4XOtomDcJlr5/bmgcnrZiJeZIS+qixzVn1EWqgCZ4E=
+github.com/coder/anthropic-sdk-go v0.0.0-20260428122333-47cab198e449/go.mod h1:hqlYqR7uPKOKfnNeicUbZp0Ps0GeYFlKYtwh5HGDCx8=
 github.com/coder/boundary v0.8.4-0.20260304164748-566aeea939ab h1:HrlxyTmMQpOHfSKzRU1vf5TxrmV6vL5OiWq+Dvn5qh0=
 github.com/coder/boundary v0.8.4-0.20260304164748-566aeea939ab/go.mod h1:BhJhyKW/+zZQzaGZ3vn27if2k0Vx5xLXzq7ZCQx5gPk=
 github.com/coder/bubbletea v1.2.2-0.20241212190825-007a1cdb2c41 h1:SBN/DA63+ZHwuWwPHPYoCZ/KLAjHv5g4h2MS4f2/MTI=