Models
Claude Sonnet 5.5
Model id: anthropic/claude-sonnet-5-5
- Agentic
- Fast
- Coding
- Reasoning
- Vision
- Long context
- Tools
- Writing
- Legal
- Government
Anthropic’s Claude Sonnet 5.5, a faster Sonnet at the same price as Sonnet 5.
Best for
production coding, agents, and everyday work that wants Sonnet speed.
- Provider
- Anthropic
- Context window
- 1,000,000
- Release date
- 2026-09-28
- Reasoning effort
- lowmediumhighxhighmaxDefault: high
Pricing
Input
307.846 ¢ CA / 1M
Cached input
30.7846 ¢ CA / 1M
Output
1,539.23 ¢ CA / 1M
Cache write
384.8075 ¢ CA / 1M
Cache write (1h)
615.692 ¢ CA / 1M
Web search
Per successful search
1.5392 ¢ CA / search
Billed on top of tokens when the model uses web search.
Amounts in Canadian dollars, converted at the Bank of Canada indicative rate (2026-10-23).
Performance
Reading
Last 7 days
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Activity
Tokens
—
—
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Top 5 tools · last 7 days
Not enough data to display tool activity.
Availability
Availability (%)
Last 7 days
- Operational probes
- 100% over 7 days
- Samples
- 9,122
Quick start
Call the API with a tonia_ key and the exact model id below.
curl
curl https://pass.tonia.ca:8443/v1/chat/completions \
-H "Authorization: Bearer $TONIA_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-sonnet-5-5",
"messages": [
{
"role": "user",
"content": "Bonjour"
}
]
}'Python (OpenAI SDK)
import os
from openai import OpenAI
client = OpenAI(
base_url="https://pass.tonia.ca:8443/v1",
api_key=os.environ["TONIA_API_KEY"],
)
response = client.chat.completions.create(
model="anthropic/claude-sonnet-5-5",
messages=[{"role": "user", "content": "Bonjour"}],
)TypeScript (OpenAI SDK)
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://pass.tonia.ca:8443/v1",
apiKey: process.env.TONIA_API_KEY,
});
const response = await client.chat.completions.create({
model: "anthropic/claude-sonnet-5-5",
messages: [{ role: "user", content: "Bonjour" }],
});With the Anthropic API (/v1/messages), Claude models are used without the anthropic/ prefix.