About
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
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Pricing
Input
$2.00
per 1M tokens
Output
$10.00
per 1M tokens
Blended
$4.00
per 1M tokens
Cheaper than 15% of models. Median price is $0.54/1M tokens.
Cost Calculator
Tokens per day1M
100K100M
Daily
$4.00
Monthly
$120.00
vs. Similar Models
Anthropic Claude Sonnet Latest
$4.000%
Meta: Llama 3.1 405B (base)
$4.000%
Mistral Medium
$4.09+2%
Llama 3.1 Instruct 405B
$3.69-8%
Performance
Context Window
1.0M
tokens
Larger than 80% of models
Max Output
128K
tokens
13% of context
Context Window Comparison
Anthropic: Claude Fable 5
1.0MSame
Anthropic: Claude Opus 4.8
1.0MSame
Anthropic: Claude Opus 4.7
1.0MSame