Claude Sonnet 4 5 20250929
anthropic/claude-sonnet-4-5-20250929Claude Sonnet 4 5 20250929 (anthropic/claude-sonnet-4-5-20250929) is an AI model from Anthropic with a 200,000-token context window and 64,000 max output tokens, priced at $3.00/1M input and $15.00/1M output tokens. Available via the haimaker.ai OpenAI-compatible API.
Overview
Anthropic's Claude Sonnet 4.5, combining strong reasoning and coding with efficient speed for production workloads.
Features & Capabilities
| Mode | chat |
| Context Window | 200,000 tokens |
| Max Output | 64,000 tokens |
| Function Calling | Supported |
| Vision | Supported |
| Reasoning | Supported |
| Web Search | Supported |
| Url Context | - |
API Usage
from openai import OpenAI
client = OpenAI(
base_url="https://api.haimaker.ai/v1",
api_key="YOUR_API_KEY",
)
response = client.chat.completions.create(
model="anthropic/claude-sonnet-4-5-20250929",
messages=[
{"role": "user", "content": "Hello, how are you?"}
],
)
print(response.choices[0].message.content)Frequently Asked Questions
What is the context window of Claude Sonnet 4 5 20250929?
Claude Sonnet 4 5 20250929 (anthropic/claude-sonnet-4-5-20250929) has a 200,000-token context window and supports up to 64,000 output tokens per request.
How much does Claude Sonnet 4 5 20250929 cost?
Claude Sonnet 4 5 20250929 is priced at $3.00 per 1M input tokens and $15.00 per 1M output tokens when accessed via the haimaker.ai OpenAI-compatible API.
What features does Claude Sonnet 4 5 20250929 support?
Claude Sonnet 4 5 20250929 supports function calling, vision, reasoning, web search.
How do I use Claude Sonnet 4 5 20250929 via API?
Send requests to https://api.haimaker.ai/v1/chat/completions with model "anthropic/claude-sonnet-4-5-20250929" using any OpenAI-compatible SDK. Authentication uses a Bearer API key from https://app.haimaker.ai.
Use Claude Sonnet 4 5 20250929 with the haimaker API
OpenAI-compatible endpoint. Start building in minutes.