From e626bcfcd4353d9e72b5cccdc7fd44e3dca432ec Mon Sep 17 00:00:00 2001
From: Bryan Helmkamp <bryan@brynary.com>
Date: Thu, 19 Mar 2026 13:33:16 -0400
Subject: [PATCH] Change default Anthropic model from claude-opus-4-6 to
 claude-sonnet-4-6

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 lib/crates/fabro-cli/src/commands/run.rs | 4 ++--
 lib/crates/fabro-llm/src/catalog.json    | 6 +++---
 lib/crates/fabro-llm/src/catalog.rs      | 6 +++---
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/lib/crates/fabro-cli/src/commands/run.rs b/lib/crates/fabro-cli/src/commands/run.rs
index 8ea790909..5b9a04f54 100644
--- a/lib/crates/fabro-cli/src/commands/run.rs
+++ b/lib/crates/fabro-cli/src/commands/run.rs
@@ -2743,8 +2743,8 @@ mod tests {
         let graph = fabro_graphviz::graph::Graph::new("test");
         let defaults = RunDefaults::default();
         let (model, provider) = resolve_model_provider(None, None, None, &defaults, &graph);
-        assert_eq!(model, "claude-opus-4-6");
-        // Catalog resolves anthropic as the provider for claude-opus-4-6
+        assert_eq!(model, "claude-sonnet-4-6");
+        // Catalog resolves anthropic as the provider for claude-sonnet-4-6
         assert_eq!(provider, Some("anthropic".to_string()));
     }
 
diff --git a/lib/crates/fabro-llm/src/catalog.json b/lib/crates/fabro-llm/src/catalog.json
index dccabd728..608dd11d0 100644
--- a/lib/crates/fabro-llm/src/catalog.json
+++ b/lib/crates/fabro-llm/src/catalog.json
@@ -13,8 +13,7 @@
       "cache_input_cost_per_mtok": 1.50
     },
     "estimated_output_tps": 25,
-    "aliases": ["opus", "claude-opus"],
-    "default": true
+    "aliases": ["opus", "claude-opus"]
   },
   {
     "id": "claude-sonnet-4-5",
@@ -46,7 +45,8 @@
       "cache_input_cost_per_mtok": 0.30
     },
     "estimated_output_tps": 50,
-    "aliases": ["sonnet", "claude-sonnet"]
+    "aliases": ["sonnet", "claude-sonnet"],
+    "default": true
   },
   {
     "id": "claude-haiku-4-5",
diff --git a/lib/crates/fabro-llm/src/catalog.rs b/lib/crates/fabro-llm/src/catalog.rs
index cd4bcbd45..8095aa527 100644
--- a/lib/crates/fabro-llm/src/catalog.rs
+++ b/lib/crates/fabro-llm/src/catalog.rs
@@ -206,7 +206,7 @@ mod tests {
     #[test]
     fn default_model_for_provider_returns_correct_model() {
         let m = default_model_for_provider("anthropic").unwrap();
-        assert_eq!(m.id, "claude-opus-4-6");
+        assert_eq!(m.id, "claude-sonnet-4-6");
         assert!(m.default);
 
         let m = default_model_for_provider("openai").unwrap();
@@ -289,7 +289,7 @@ mod tests {
                 "opus",
                 "claude-opus",
             ],
-            default: true,
+            default: false,
         }
         "#);
     }
@@ -637,7 +637,7 @@ mod tests {
     #[test]
     fn probe_model_anthropic_returns_default() {
         let m = probe_model_for_provider("anthropic").unwrap();
-        assert_eq!(m.id, "claude-opus-4-6");
+        assert_eq!(m.id, "claude-sonnet-4-6");
     }
 
     #[test]