Claude Sonnet 4.5
Anthropic
Claude Sonnet 4.5 is the newest model in the Sonnet series, offering improvements and updates over Sonnet 4.
- Language
- Explicit caching
- File input
- Reasoning
- Tool use
- Vision
- Web search
- Context
- 1M
- Max output
- 64K
- Input / 1M
- $3.00
- Output / 1M
- $15.00
Quickstart
Point any OpenAI-compatible client at Maxynetic Systems and pass anthropic/claude-sonnet-4.5 as the model.
curl https://api.maxynetic.com/v1/chat/completions \
-H "Authorization: Bearer $MAXYNETIC_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-sonnet-4.5",
"messages": [{ "role": "user", "content": "Explain routing in one line." }]
}'Pricing
Billed per token with no markup on the underlying provider rate.
Input
Per 1M prompt tokens
$3.00
Output
Per 1M completion tokens
$15.00
Cache read
Per 1M cached prompt tokens
$0.300
Cache write
Per 1M tokens written to cache
$3.75
A 1M-token prompt with 250K tokens of output costs about $6.75.