diff --git a/lib/crates/fabro-model/src/catalog.rs b/lib/crates/fabro-model/src/catalog.rs
index 20ac495af..755a8b6c2 100644
--- a/lib/crates/fabro-model/src/catalog.rs
+++ b/lib/crates/fabro-model/src/catalog.rs
@@ -1817,6 +1817,40 @@ enabled = true
         assert!(catalog.default_for_provider(&ollama).is_none());
     }
 
+    #[test]
+    fn builtin_openrouter_provider_is_opt_in() {
+        let openrouter = ProviderId::new("openrouter");
+        let builtin = Catalog::builtin();
+
+        assert!(builtin.provider(&openrouter).is_none());
+        assert!(builtin.list(Some(&openrouter)).is_empty());
+
+        let catalog = Catalog::from_builtin_with_overrides(&minimal_settings(
+            r"
+[providers.openrouter]
+enabled = true
+",
+        ))
+        .expect("enabled OpenRouter override should build from the built-in provider settings");
+
+        let provider = catalog
+            .provider(&openrouter)
+            .expect("enabled OpenRouter provider should be present");
+        assert_eq!(provider.adapter, AdapterKind::OpenAiCompatible);
+        assert_eq!(
+            provider.base_url.as_deref(),
+            Some("https://openrouter.ai/api/v1")
+        );
+
+        let models = catalog.list(Some(&openrouter));
+        assert_eq!(models.len(), 17);
+
+        let default = catalog
+            .default_for_provider(&openrouter)
+            .expect("openrouter catalog should have a default model");
+        assert_eq!(default.id, "anthropic/claude-sonnet-4-6");
+    }
+
     #[test]
     fn builtin_get_by_id() {
         let m = Catalog::builtin().get("claude-opus-4-6").unwrap();
diff --git a/lib/crates/fabro-model/src/catalog/providers/openrouter.toml b/lib/crates/fabro-model/src/catalog/providers/openrouter.toml
new file mode 100644
index 000000000..e9c9ccae5
--- /dev/null
+++ b/lib/crates/fabro-model/src/catalog/providers/openrouter.toml
@@ -0,0 +1,361 @@
+[providers.openrouter]
+display_name = "OpenRouter"
+adapter = "openai_compatible"
+api_key_url = "https://openrouter.ai/keys"
+base_url = "https://openrouter.ai/api/v1"
+priority = 25
+enabled = false
+
+[providers.openrouter.auth]
+credentials = ["env:OPENROUTER_API_KEY", "vault:OPENROUTER_API_KEY"]
+
+[providers.openrouter.extra_headers]
+"HTTP-Referer" = { literal = "https://fabro.sh" }
+"X-Title" = { literal = "Fabro" }
+
+# To enable OpenRouter, add the following to ~/.fabro/settings.toml:
+#
+# [llm.providers.openrouter]
+# enabled = true
+#
+# Then run `fabro provider login openrouter` to store the API key,
+# or set the OPENROUTER_API_KEY environment variable.
+
+# ---------- Anthropic via OpenRouter ----------
+
+[models."anthropic/claude-opus-4-7"]
+provider = "openrouter"
+api_id = "anthropic/claude-opus-4.7"
+display_name = "Claude Opus 4.7 (via OpenRouter)"
+family = "or-claude-4"
+
+[models."anthropic/claude-opus-4-7".limits]
+context_window = 1000000
+max_output = 128000
+
+[models."anthropic/claude-opus-4-7".features]
+tools = true
+vision = true
+reasoning = true
+prompt_cache = true
+
+[models."anthropic/claude-opus-4-7".costs]
+input_cost_per_mtok = 5.0
+output_cost_per_mtok = 25.0
+cache_input_cost_per_mtok = 0.5
+
+[models."anthropic/claude-sonnet-4-6"]
+provider = "openrouter"
+api_id = "anthropic/claude-sonnet-4.6"
+display_name = "Claude Sonnet 4.6 (via OpenRouter)"
+family = "or-claude-4"
+default = true
+
+[models."anthropic/claude-sonnet-4-6".limits]
+context_window = 1000000
+max_output = 64000
+
+[models."anthropic/claude-sonnet-4-6".features]
+tools = true
+vision = true
+reasoning = true
+prompt_cache = true
+
+[models."anthropic/claude-sonnet-4-6".costs]
+input_cost_per_mtok = 3.0
+output_cost_per_mtok = 15.0
+cache_input_cost_per_mtok = 0.3
+
+[models."anthropic/claude-haiku-4-5"]
+provider = "openrouter"
+api_id = "anthropic/claude-haiku-4.5"
+display_name = "Claude Haiku 4.5 (via OpenRouter)"
+family = "or-claude-4"
+small_default = true
+
+[models."anthropic/claude-haiku-4-5".limits]
+context_window = 200000
+max_output = 8192
+
+[models."anthropic/claude-haiku-4-5".features]
+tools = true
+vision = true
+reasoning = false
+prompt_cache = true
+
+[models."anthropic/claude-haiku-4-5".costs]
+input_cost_per_mtok = 1.0
+output_cost_per_mtok = 5.0
+cache_input_cost_per_mtok = 0.1
+
+# ---------- OpenAI via OpenRouter ----------
+
+[models."openai/gpt-5.4"]
+provider = "openrouter"
+api_id = "openai/gpt-5.4"
+display_name = "GPT-5.4 (via OpenRouter)"
+family = "or-gpt-5"
+
+[models."openai/gpt-5.4".limits]
+context_window = 1050000
+max_output = 32768
+
+[models."openai/gpt-5.4".features]
+tools = true
+vision = true
+reasoning = true
+
+[models."openai/gpt-5.4".costs]
+input_cost_per_mtok = 2.5
+output_cost_per_mtok = 15.0
+
+[models."openai/gpt-5.5"]
+provider = "openrouter"
+api_id = "openai/gpt-5.5"
+display_name = "GPT-5.5 (via OpenRouter)"
+family = "or-gpt-5"
+
+[models."openai/gpt-5.5".limits]
+context_window = 1050000
+max_output = 32768
+
+[models."openai/gpt-5.5".features]
+tools = true
+vision = true
+reasoning = true
+
+[models."openai/gpt-5.5".costs]
+input_cost_per_mtok = 5.0
+output_cost_per_mtok = 30.0
+
+# ---------- Google Gemini via OpenRouter ----------
+
+[models."google/gemini-3.1-pro-preview"]
+provider = "openrouter"
+api_id = "google/gemini-3.1-pro-preview"
+display_name = "Gemini 3.1 Pro Preview (via OpenRouter)"
+family = "or-gemini-3"
+
+[models."google/gemini-3.1-pro-preview".limits]
+context_window = 1048576
+max_output = 65536
+
+[models."google/gemini-3.1-pro-preview".features]
+tools = true
+vision = true
+reasoning = true
+
+[models."google/gemini-3.1-pro-preview".costs]
+input_cost_per_mtok = 2.0
+output_cost_per_mtok = 12.0
+
+[models."google/gemini-3.5-flash"]
+provider = "openrouter"
+api_id = "google/gemini-3.5-flash"
+display_name = "Gemini 3.5 Flash (via OpenRouter)"
+family = "or-gemini-3"
+
+[models."google/gemini-3.5-flash".limits]
+context_window = 1048576
+max_output = 65536
+
+[models."google/gemini-3.5-flash".features]
+tools = true
+vision = true
+reasoning = false
+
+[models."google/gemini-3.5-flash".costs]
+input_cost_per_mtok = 1.5
+output_cost_per_mtok = 9.0
+
+# ---------- Open-weights models ----------
+
+[models."xiaomi/mimo-v2.5-pro"]
+provider = "openrouter"
+api_id = "xiaomi/mimo-v2.5-pro"
+display_name = "Xiaomi MiMo v2.5 Pro"
+family = "or-mimo"
+
+[models."xiaomi/mimo-v2.5-pro".limits]
+context_window = 1050000
+max_output = 16384
+
+[models."xiaomi/mimo-v2.5-pro".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."xiaomi/mimo-v2.5-pro".costs]
+input_cost_per_mtok = 0.435
+output_cost_per_mtok = 0.87
+
+[models."minimax/minimax-m2.7"]
+provider = "openrouter"
+api_id = "minimax/minimax-m2.7"
+display_name = "MiniMax M2.7"
+family = "or-minimax"
+
+[models."minimax/minimax-m2.7".limits]
+context_window = 200000
+max_output = 16384
+
+[models."minimax/minimax-m2.7".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."minimax/minimax-m2.7".costs]
+input_cost_per_mtok = 0.28
+output_cost_per_mtok = 1.20
+
+[models."deepseek/deepseek-v4-pro"]
+provider = "openrouter"
+api_id = "deepseek/deepseek-v4-pro"
+display_name = "DeepSeek V4 Pro"
+family = "or-deepseek"
+
+[models."deepseek/deepseek-v4-pro".limits]
+context_window = 1050000
+max_output = 16384
+
+[models."deepseek/deepseek-v4-pro".features]
+tools = true
+vision = false
+reasoning = true
+
+[models."deepseek/deepseek-v4-pro".costs]
+input_cost_per_mtok = 0.435
+output_cost_per_mtok = 0.87
+
+[models."deepseek/deepseek-v4-flash"]
+provider = "openrouter"
+api_id = "deepseek/deepseek-v4-flash"
+display_name = "DeepSeek V4 Flash"
+family = "or-deepseek"
+
+[models."deepseek/deepseek-v4-flash".limits]
+context_window = 1050000
+max_output = 16384
+
+[models."deepseek/deepseek-v4-flash".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."deepseek/deepseek-v4-flash".costs]
+input_cost_per_mtok = 0.10
+output_cost_per_mtok = 0.20
+
+[models."moonshotai/kimi-k2.6"]
+provider = "openrouter"
+api_id = "moonshotai/kimi-k2.6"
+display_name = "Kimi K2.6"
+family = "or-kimi"
+
+[models."moonshotai/kimi-k2.6".limits]
+context_window = 262144
+max_output = 16384
+
+[models."moonshotai/kimi-k2.6".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."moonshotai/kimi-k2.6".costs]
+input_cost_per_mtok = 0.73
+output_cost_per_mtok = 3.49
+
+[models."qwen/qwen3-coder"]
+provider = "openrouter"
+api_id = "qwen/qwen3-coder"
+display_name = "Qwen3 Coder"
+family = "or-qwen-3"
+
+[models."qwen/qwen3-coder".limits]
+context_window = 1050000
+max_output = 16384
+
+[models."qwen/qwen3-coder".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."qwen/qwen3-coder".costs]
+input_cost_per_mtok = 0.22
+output_cost_per_mtok = 1.80
+
+[models."qwen/qwen3.6-flash"]
+provider = "openrouter"
+api_id = "qwen/qwen3.6-flash"
+display_name = "Qwen3.6 Flash"
+family = "or-qwen-3"
+
+[models."qwen/qwen3.6-flash".limits]
+context_window = 1000000
+max_output = 16384
+
+[models."qwen/qwen3.6-flash".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."qwen/qwen3.6-flash".costs]
+input_cost_per_mtok = 0.1875
+output_cost_per_mtok = 1.125
+
+[models."z-ai/glm-4.6"]
+provider = "openrouter"
+api_id = "z-ai/glm-4.6"
+display_name = "GLM 4.6"
+family = "or-glm"
+
+[models."z-ai/glm-4.6".limits]
+context_window = 203000
+max_output = 16384
+
+[models."z-ai/glm-4.6".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."z-ai/glm-4.6".costs]
+input_cost_per_mtok = 0.43
+output_cost_per_mtok = 1.74
+
+[models."nvidia/nemotron-3-super-120b-a12b"]
+provider = "openrouter"
+api_id = "nvidia/nemotron-3-super-120b-a12b"
+display_name = "NVIDIA Nemotron 3 Super 120B"
+family = "or-nemotron"
+
+[models."nvidia/nemotron-3-super-120b-a12b".limits]
+context_window = 1000000
+max_output = 16384
+
+[models."nvidia/nemotron-3-super-120b-a12b".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."nvidia/nemotron-3-super-120b-a12b".costs]
+input_cost_per_mtok = 0.09
+output_cost_per_mtok = 0.45
+
+[models."mistralai/devstral-2512"]
+provider = "openrouter"
+api_id = "mistralai/devstral-2512"
+display_name = "Devstral 2512"
+family = "or-devstral"
+
+[models."mistralai/devstral-2512".limits]
+context_window = 262144
+max_output = 16384
+
+[models."mistralai/devstral-2512".features]
+tools = true
+vision = false
+reasoning = false
+
+[models."mistralai/devstral-2512".costs]
+input_cost_per_mtok = 0.40
+output_cost_per_mtok = 2.00
diff --git a/lib/crates/fabro-static/src/env_vars.rs b/lib/crates/fabro-static/src/env_vars.rs
index eec275f72..315de6477 100644
--- a/lib/crates/fabro-static/src/env_vars.rs
+++ b/lib/crates/fabro-static/src/env_vars.rs
@@ -56,6 +56,7 @@ impl EnvVars {
     pub const OPENAI_PROJECT: &'static str = "OPENAI_PROJECT";
     pub const OPENAI_ORG_ID: &'static str = "OPENAI_ORG_ID";
     pub const OPENAI_PROJECT_ID: &'static str = "OPENAI_PROJECT_ID";
+    pub const OPENROUTER_API_KEY: &'static str = "OPENROUTER_API_KEY";
     pub const ZAI_API_KEY: &'static str = "ZAI_API_KEY";
 
     // GitHub, OAuth, and Slack
@@ -193,6 +194,7 @@ mod tests {
             EnvVars::OPENAI_PROJECT,
             EnvVars::OPENAI_ORG_ID,
             EnvVars::OPENAI_PROJECT_ID,
+            EnvVars::OPENROUTER_API_KEY,
             EnvVars::ZAI_API_KEY,
             EnvVars::GH_TOKEN,
             EnvVars::GITHUB_APP_CLIENT_SECRET,
diff --git a/lib/crates/fabro-static/src/secret_registry.rs b/lib/crates/fabro-static/src/secret_registry.rs
index 8534636bd..b6770aeab 100644
--- a/lib/crates/fabro-static/src/secret_registry.rs
+++ b/lib/crates/fabro-static/src/secret_registry.rs
@@ -28,6 +28,7 @@ const OPTIONAL_VAULT_SECRETS: &[&str] = &[
     EnvVars::KIMI_API_KEY,
     EnvVars::MINIMAX_API_KEY,
     EnvVars::OPENAI_API_KEY,
+    EnvVars::OPENROUTER_API_KEY,
     EnvVars::ZAI_API_KEY,
     EnvVars::DAYTONA_API_KEY,
 ];
@@ -90,6 +91,7 @@ mod tests {
             EnvVars::KIMI_API_KEY,
             EnvVars::MINIMAX_API_KEY,
             EnvVars::OPENAI_API_KEY,
+            EnvVars::OPENROUTER_API_KEY,
             EnvVars::ZAI_API_KEY,
         ] {
             assert_eq!(