Anthropic: Claude Sonnet 4.5 Thinking
Anthropic's Claude Sonnet 4.5, the September 2025 Sonnet model, for coding, building agents and computer use. It takes text and images, answers in text, and supports extended thinking, including thinking between tool calls.
- Price per 1M tokens
- $4.50 / $23.00
- input / output
- Cached input
- $0.45
- per 1M tokens
- Context
- 200K tokens
- 64K max output
- Providers
- 3
Providers
Compare all 3 providers of Claude Sonnet 4.5 Thinking by price, speed and uptime, and call any of them through one OpenAI-compatible API.
Provider prices are what each provider charges. You pay the price above until pass-through billing starts; then you pay the provider's price directly.
200K context · 64K max output
200K context · 64K max output
- 1 more provider through partner hosts · from $3.15 in · $15.77 out
Per 1M tokens: the provider's own price. Speed and uptime show here once measured. “Requests go here” marks where a request that names no provider goes now. Logos are trademarks of their owners.
Price history
API
curl https://api.opencheap.si/v1/chat/completions \
-H "Authorization: Bearer $OPENCHEAP_API_KEY" -H "Content-Type: application/json" \
-d '{ "model": "opencheap/claude-sonnet-4.5:thinking", "messages": [{ "role": "user", "content": "Hi" }] }'