Add support for Haiku 4.5 CUA

Author: miguelg719

.changeset/polite-dogfish-of-purring.md

@@ -0,0 +1,5 @@
+---
+"stagehand": patch
+---
+
+Add support for Haiku 4.5 CUA

stagehand/agent/agent.py

@@ -20,6 +20,7 @@
     "computer-use-preview-03-11": OpenAICUAClient,
     "claude-3-5-sonnet-latest": AnthropicCUAClient,
     "claude-3-7-sonnet-latest": AnthropicCUAClient,
+    "claude-haiku-4-5-20251001": AnthropicCUAClient,
     "claude-sonnet-4-20250514": AnthropicCUAClient,
     "claude-sonnet-4-5-20250929": AnthropicCUAClient,
     "gemini-2.5-computer-use-preview-10-2025": GoogleCUAClient,
@@ -28,6 +29,7 @@
     "computer-use-preview-03-11": AgentProvider.OPENAI,
     "claude-3-5-sonnet-20240620": AgentProvider.ANTHROPIC,
     "claude-3-7-sonnet-20250219": AgentProvider.ANTHROPIC,
+    "claude-haiku-4-5-20251001": AgentProvider.ANTHROPIC,
     "claude-sonnet-4-20250514": AgentProvider.ANTHROPIC,
     "claude-sonnet-4-5-20250929": AgentProvider.ANTHROPIC,
     "gemini-2.5-computer-use-preview-10-2025": AgentProvider.GOOGLE,