feat: add Gemini model provider (#725)

Author: notgitika

README.md

@@ -37,7 +37,7 @@ Strands Agents is a simple yet powerful SDK that takes a model-driven approach t
 ## Feature Overview
 
 - **Lightweight & Flexible**: Simple agent loop that just works and is fully customizable
-- **Model Agnostic**: Support for Amazon Bedrock, Anthropic, LiteLLM, Llama, Ollama, OpenAI, Writer, and custom providers
+- **Model Agnostic**: Support for Amazon Bedrock, Anthropic, Gemini, LiteLLM, Llama, Ollama, OpenAI, Writer, and custom providers
 - **Advanced Capabilities**: Multi-agent systems, autonomous agents, and streaming support
 - **Built-in MCP**: Native support for Model Context Protocol (MCP) servers, enabling access to thousands of pre-built tools
 
@@ -129,6 +129,8 @@ from strands import Agent
 from strands.models import BedrockModel
 from strands.models.ollama import OllamaModel
 from strands.models.llamaapi import LlamaAPIModel
+from strands.models.gemini import GeminiModel
+from strands.models.llamacpp import LlamaCppModel
 
 # Bedrock
 bedrock_model = BedrockModel(
@@ -139,6 +141,15 @@ bedrock_model = BedrockModel(
 agent = Agent(model=bedrock_model)
 agent("Tell me about Agentic AI")
 
+# Google Gemini
+gemini_model = GeminiModel(
+  api_key="your_gemini_api_key",
+  model_id="gemini-2.5-flash",
+  params={"temperature": 0.7}
+)
+agent = Agent(model=gemini_model)
+agent("Tell me about Agentic AI")
+
 # Ollama
 ollama_model = OllamaModel(
   host="http://localhost:11434",
@@ -158,6 +169,7 @@ response = agent("Tell me about Agentic AI")
 Built-in providers:
  - [Amazon Bedrock](https://strandsagents.com/latest/user-guide/concepts/model-providers/amazon-bedrock/)
  - [Anthropic](https://strandsagents.com/latest/user-guide/concepts/model-providers/anthropic/)
+ - [Gemini](https://strandsagents.com/latest/user-guide/concepts/model-providers/gemini/)
  - [Cohere](https://strandsagents.com/latest/user-guide/concepts/model-providers/cohere/)
  - [LiteLLM](https://strandsagents.com/latest/user-guide/concepts/model-providers/litellm/)
  - [llama.cpp](https://strandsagents.com/latest/user-guide/concepts/model-providers/llamacpp/)

pyproject.toml

@@ -42,6 +42,7 @@ dependencies = [
 
 [project.optional-dependencies]
 anthropic = ["anthropic>=0.21.0,<1.0.0"]
+gemini = ["google-genai>=1.32.0,<2.0.0"]
 litellm = ["litellm>=1.75.9,<2.0.0", "openai>=1.68.0,<1.108.0"]
 llamaapi = ["llama-api-client>=0.1.0,<1.0.0"]
 mistral = ["mistralai>=1.8.2"]
@@ -67,7 +68,7 @@ a2a = [
     "fastapi>=0.115.12,<1.0.0",
     "starlette>=0.46.2,<1.0.0",
 ]
-all = ["strands-agents[a2a,anthropic,docs,litellm,llamaapi,mistral,ollama,openai,writer,sagemaker,otel]"]
+all = ["strands-agents[a2a,anthropic,docs,gemini,litellm,llamaapi,mistral,ollama,openai,writer,sagemaker,otel]"]
 
 dev = [
     "commitizen>=4.4.0,<5.0.0",