Bump Cohere SDK and remove incorrect typing workaround (pydantic#2886)

Author: DouweM

pydantic_ai_slim/pydantic_ai/models/cohere.py

@@ -207,7 +207,7 @@ def _process_response(self, response: V2ChatResponse) -> ModelResponse:
                 if content.type == 'text':
                     parts.append(TextPart(content=content.text))
                 elif content.type == 'thinking':  # pragma: no branch
-                    parts.append(ThinkingPart(content=cast(str, content.thinking)))  # pyright: ignore[reportUnknownMemberType,reportAttributeAccessIssue] - https://github.com/cohere-ai/cohere-python/issues/692
+                    parts.append(ThinkingPart(content=content.thinking))
         for c in response.message.tool_calls or []:
             if c.function and c.function.name and c.function.arguments:  # pragma: no branch
                 parts.append(
@@ -258,7 +258,7 @@ def _map_messages(self, messages: list[ModelMessage]) -> list[ChatMessageV2]:
                 if texts or thinking:
                     contents: list[AssistantMessageV2ContentItem] = []
                     if thinking:
-                        contents.append(ThinkingAssistantMessageV2ContentItem(thinking='\n\n'.join(thinking)))  # pyright: ignore[reportCallIssue] - https://github.com/cohere-ai/cohere-python/issues/692
+                        contents.append(ThinkingAssistantMessageV2ContentItem(thinking='\n\n'.join(thinking)))
                     if texts:  # pragma: no branch
                         contents.append(TextAssistantMessageV2ContentItem(text='\n\n'.join(texts)))
                     message_param.content = contents

pydantic_ai_slim/pyproject.toml

@@ -68,7 +68,7 @@ dependencies = [
 logfire = ["logfire[httpx]>=3.14.1"]
 # Models
 openai = ["openai>=1.99.9"]
-cohere = ["cohere>=5.17.0; platform_system != 'Emscripten'"]
+cohere = ["cohere>=5.18.0; platform_system != 'Emscripten'"]
 vertexai = ["google-auth>=2.36.0", "requests>=2.32.2"]
 google = ["google-genai>=1.31.0"]
 anthropic = ["anthropic>=0.61.0"]