diff --git a/.github/actions/run-claude/action.yml b/.github/actions/run-claude/action.yml
index fff6788a6..66f4bb286 100644
--- a/.github/actions/run-claude/action.yml
+++ b/.github/actions/run-claude/action.yml
@@ -40,7 +40,7 @@ inputs:
   model:
     description: "Model to use for Claude"
     required: false
-    default: "claude-opus-4-6"
+    default: "claude-opus-4-8"
 
   allowed-bots:
     description: "Allowed bot usernames, or '*' for all bots"
diff --git a/.github/workflows/marvin-dedupe-issues.yml b/.github/workflows/marvin-dedupe-issues.yml
index 214414513..c98bc1312 100644
--- a/.github/workflows/marvin-dedupe-issues.yml
+++ b/.github/workflows/marvin-dedupe-issues.yml
@@ -103,7 +103,7 @@ jobs:
             --allowedTools "Bash(gh issue view:*)","Bash(gh search:*)","Bash(gh issue list:*)","Bash(gh api:*)","Bash(gh issue comment:*)",Task
           settings: |
             {
-              "model": "claude-sonnet-4-6",
+              "model": "claude-sonnet-5",
               "env": {
                 "GH_TOKEN": "${{ steps.marvin-token.outputs.token }}"
               }
diff --git a/.github/workflows/marvin-label-triage.yml b/.github/workflows/marvin-label-triage.yml
index 6c77f6f59..537532ab4 100644
--- a/.github/workflows/marvin-label-triage.yml
+++ b/.github/workflows/marvin-label-triage.yml
@@ -156,7 +156,7 @@ jobs:
             --allowedTools "Bash(gh label list:*)","Bash(bash .github/scripts/triage-label.sh:*)",mcp__github__get_issue,mcp__github__get_issue_comments,mcp__github__add_issue_comment,mcp__github__get_pull_request_files
           settings: |
             {
-              "model": "claude-sonnet-4-6",
+              "model": "claude-sonnet-5",
               "env": {
                 "GH_TOKEN": "${{ steps.marvin-token.outputs.token }}",
                 "TRIAGE_REPO": "${{ github.repository }}",