Claude Sonnet 4.6
Legacy · availableA legacy, still-available Claude API model with a million-token context window and adaptive thinking.
Access details: Anthropic · Claude API
The model ID to use in API requests.
claude-sonnet-4-6Updated Sep 23, 2026
Capabilities & limits
- Context window
- 1M
- Maximum output
- 128K
- Image input
- Supported
- Tool calling
- Supported
- Structured output
- Supported
Pricing
USD / 1M tokens- Input
- $3.00
- Output
- $15.00
USD per million tokens. Standard global text requests, excluding cache, batch, tools, taxes, and regional premiums.
Full rate card 5 rates
All prices in USD.
Base input tokens
$3.00 per 1M tokens- Claude API global standard
Output tokens
$15.00 per 1M tokens- Claude API global standard
Cache hits and refreshes
$0.30 per 1M tokens- prompt caching
5 minute cache writes
$3.75 per 1M tokens- prompt caching
- 5 minute duration
1 hour cache writes
$6.00 per 1M tokens- prompt caching
- 1 hour duration
Full 1M-token context window uses standard pricing, including requests over 200K input tokens; prompt caching and Batch discounts remain at standard rates.
Price history
Sep 13, 2026
Input $3.00 per million tokens
Oct 20, 2026
Input $3.00 per million tokens
Sep 13, 2026
Output $15.00 per million tokens
Oct 20, 2026
Output $15.00 per million tokens
Technical details
- Parameters
- Not published
- Active parameters
- Not published
- Architecture
- Not published
- Training / knowledge cutoff
- Jan 2026
- Input modalities
- Text, image
- Output modalities
- Text
From Anthropic
Official announcement ↗Release & lifecycle
- First available
- Feb 17, 2026
- legacy
- As of Sep 13, 2026
- legacy
- As of Oct 20, 2026