About
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Related Models
Anthropic: Claude Sonnet 52026-06-30Claude Sonnet 5 (Non-reasoning, High Effort)2026-06-30Claude Sonnet 5 (Adaptive Reasoning, High Effort)2026-06-30Claude Sonnet 5 (Adaptive Reasoning, Low Effort)2026-06-30Claude Sonnet 5 (Adaptive Reasoning, Medium Effort)2026-06-30Claude Sonnet 5 (Adaptive Reasoning, Xhigh Effort)2026-06-30Anthropic: Claude Fable 52026-06-09Anthropic: Claude Opus 4.82026-05-27
Pricing
Input
$3.00
per 1M tokens
Output
$15.00
per 1M tokens
Blended
$6.00
per 1M tokens
Cheaper than 8% of models. Median price is $0.68/1M tokens.
Cost Calculator
Tokens per day1M
100K100M
Daily
$6.00
Monthly
$180.00
vs. Similar Models
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort)
$6.000%
Claude 4.5 Sonnet (Reasoning)
$6.000%
Anthropic: Claude Sonnet 4.6
$6.000%
Claude Sonnet 4.6 (Non-reasoning, Low Effort)
$6.000%
Performance
Context Window
1.0M
tokens
Larger than 80% of models
Max Output
64K
tokens
6% 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