The same call in Gemini and Claude

Multi-provider literacy is a 2026 must. Outages, price changes, and capability differences all favor engineers who can swap providers in an hour, not a month.

Three taxi apps in your city. The button is in slightly different places but the trip is the same. You should not become loyal to one because of the button.

All three APIs follow the same pattern with slight syntactic differences. The mental model is identical: messages in, response out, usage tracked.

Google Gemini:

import os
from google import genai

client = genai.Client(api_key=os.environ["GEMINI_API_KEY"])
response = client.models.generate_content(
    model="gemini-2.5-flash",
    contents="Explain RAG to a beginner in 2 sentences.",
)
print(response.text)

Anthropic Claude:

import os
from anthropic import Anthropic

client = Anthropic()
message = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=200,
    system="You are a tutor. Reply in 2 sentences.",
    messages=[{"role": "user", "content": "Explain RAG to a beginner."}],
)
print(message.content[0].text)

Key differences:

Aspect	OpenAI	Gemini	Anthropic
SDK name	openai	google-genai	anthropic
System message	role in messages	system_instruction	top-level system param
Response access	.choices[0].message.content	.text	.content[0].text
Streaming	yes	yes	yes
JSON Schema	yes	yes	yes (tools)