Today's price · per 1M tokens
Input
$3.00
per 1M tokens
Output
$15.00
per 1M tokens
Blended
$6.00
blended $/1M — 3:1 weighted input:output
Cached input
$0.300
10% of input — prompt caching
Price receipt
We read Anthropic's own pricing page on and found Claude Sonnet 4.5 listed with a price on the same row — that read is where the number above comes from. We keep the page text we read; its content hash is 0a25039da1.
Overview
Deprecated: Anthropic retires Claude Sonnet 4.5 from the Claude API on 2026-11-30, after which requests to it fail. Until then it is still sold at $3/$15 per 1M tokens. Sonnet-tier model with hybrid reasoning; Anthropic recommends Sonnet 5.5 instead.
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is better- AA Intelligence Index: 20.7 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- AA-Omniscience Index: -0.1 (−100–100)
- GDPval-AA v2: 915.8 ELO (Real-world work tasks, human baseline = 1000)
- Ranks #32 of 100 benchmarked models by average score
- Ranks #94 of 194 comparably-measured models by percentile score, across 10 independent measurements
- Ranks #177 of 194 comparably-tested models by normalized performance per dollar
- Strongest at MMMLU — 89.1%, #5 of 32
69 tokens/sec output 31s latency to first token (TTFT)
Source: Vellum LLM Leaderboard · updated · See full rankings →
Specifications
- Provider
- Anthropic
- Context window
- 200K tokens
- Modality
- text, image
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Status
- Deprecated ends
- Last updated
- Tags
Availability verified: — per Anthropic's own deprecation notice