diff --git a/EvoScientist/llm/registry.py b/EvoScientist/llm/registry.py
index 6ebf366..4181556 100644
--- a/EvoScientist/llm/registry.py
+++ b/EvoScientist/llm/registry.py
@@ -85,6 +85,7 @@ _MODEL_ENTRIES: list[tuple[str, str, str]] = [
     # Atlas Cloud (OpenAI-compatible)
     ("qwen3.5-27b", "qwen/qwen3.5-27b", "atlascloud"),
     # Anthropic (current generation)
+    ("claude-fable-5-1", "claude-fable-5-1", "anthropic"),
     ("claude-fable-5", "claude-fable-5", "anthropic"),
     ("claude-opus-5", "claude-opus-5", "anthropic"),
     ("claude-opus-4-8", "claude-opus-4-8", "anthropic"),
@@ -162,6 +163,7 @@ _MODEL_ENTRIES: list[tuple[str, str, str]] = [
     ("glm-5.2", "zai-org/glm-5.2", "novita"),
     ("deepseek-v4-flash", "deepseek/deepseek-v4-flash-0731", "novita"),
     # OpenRouter
+    ("claude-fable-5.1", "anthropic/claude-fable-5.1", "openrouter"),
     ("claude-fable-5", "anthropic/claude-fable-5", "openrouter"),
     ("claude-opus-5", "anthropic/claude-opus-5", "openrouter"),
     ("claude-opus-5-fast", "anthropic/claude-opus-5-fast", "openrouter"),