diff --git a/README.md b/README.md
index 527f97b..1e6f375 100644
--- a/README.md
+++ b/README.md
@@ -300,8 +300,8 @@ Use exact overrides for gateways instead of guessing provider prefixes:
 ```yaml
 model: inherit
 models:
-  claude-code: anthropic/claude-sonnet-5
-  opencode: my-gateway/anthropic/claude-sonnet-5
+  claude-code: anthropic/claude-haiku-5-5
+  opencode: my-gateway/anthropic/claude-haiku-5-5
 ```
 
 These IDs illustrate routing syntax, not model availability. Use IDs advertised by your
diff --git a/crates/agentspec/src/ops/agent_render.rs b/crates/agentspec/src/ops/agent_render.rs
index 45dfd44..760f55a 100644
--- a/crates/agentspec/src/ops/agent_render.rs
+++ b/crates/agentspec/src/ops/agent_render.rs
@@ -154,10 +154,10 @@ mod tests {
     }
     #[test]
     fn exact_proxy_overrides_and_claude_aliases() {
-        let src = "---\nmodel: sonnet\nmodels:\n  opencode: proxy/anthropic/claude-sonnet-5\n  claude-code: anthropic/claude-sonnet-5\n---\nBody";
+        let src = "---\nmodel: sonnet\nmodels:\n  opencode: proxy/anthropic/claude-haiku-5-5\n  claude-code: anthropic/claude-haiku-5-5\n---\nBody";
         for (tool, model) in [
-            ("opencode", "proxy/anthropic/claude-sonnet-5"),
-            ("claude-code", "anthropic/claude-sonnet-5"),
+            ("opencode", "proxy/anthropic/claude-haiku-5-5"),
+            ("claude-code", "anthropic/claude-haiku-5-5"),
         ] {
             let out = render(src, tool).unwrap();
             let fm: Value =
diff --git a/crates/agentspec/tests/fixtures/resources/agents/full-agent.md b/crates/agentspec/tests/fixtures/resources/agents/full-agent.md
index cb5294a..edbf134 100644
--- a/crates/agentspec/tests/fixtures/resources/agents/full-agent.md
+++ b/crates/agentspec/tests/fixtures/resources/agents/full-agent.md
@@ -7,7 +7,7 @@ tools:
   - Write
 disallowedTools:
   - WebSearch
-model: claude-sonnet-4-5
+model: claude-haiku-5-5
 maxTurns: 12
 color: purple
 permissionMode: acceptEdits
diff --git a/crates/agentspec/tests/fixtures/resources/gemini-agents/researcher.md b/crates/agentspec/tests/fixtures/resources/gemini-agents/researcher.md
index bdde76e..cf29a3d 100644
--- a/crates/agentspec/tests/fixtures/resources/gemini-agents/researcher.md
+++ b/crates/agentspec/tests/fixtures/resources/gemini-agents/researcher.md
@@ -4,7 +4,7 @@ description: Performs background research with citations.
 tools:
   - google_web_search
   - web_fetch
-model: gemini-2.5-pro
+model: gemini-3.1-flash-lite
 temperature: 0.4
 max_turns: 8
 timeout_mins: 15
diff --git a/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__agents__full-agent.md.snap b/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__agents__full-agent.md.snap
index 6a97e37..5abdfc8 100644
--- a/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__agents__full-agent.md.snap
+++ b/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__agents__full-agent.md.snap
@@ -12,7 +12,7 @@ tools:
   - Write
 disallowed_tools:
   - WebSearch
-model: claude-sonnet-4-5
+model: claude-haiku-5-5
 max_turns: 12
 color: purple
 permission_mode: acceptEdits
diff --git a/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__gemini-agents__researcher.md.snap b/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__gemini-agents__researcher.md.snap
index 3cfb3b0..402b752 100644
--- a/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__gemini-agents__researcher.md.snap
+++ b/crates/agentspec/tests/snapshots/agentspec__adapters__conformance_tests__gemini-agents__researcher.md.snap
@@ -9,7 +9,7 @@ body: "Research the topic and cite every source you use.\n"
 tools:
   - google_web_search
   - web_fetch
-model: gemini-2.5-pro
+model: gemini-3.1-flash-lite
 max_turns: 8
 temperature: 0.4
 timeout_mins: 15