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Claude Sonnet 4.5 API pricing on Anthropic
Every Anthropic Claude Sonnet 4.5 rate we track, compared against 5 providers serving the same model.
Input from /1M
$1.50
Output /1M
$7.50
Price rank
#2 of 5
Last updated
September 18, 2026
The cheapest Claude Sonnet 4.5 input price we currently track is $1.20/1M on Velokey.
Anthropic Claude Sonnet 4.5 rates
Prices per 1M tokens. Batch and cached-input rates are shown where the provider publishes them.
| Mode | Input | Output |
|---|---|---|
| Batch | $1.50/1M | $7.50/1M |
| Standard | $3.00/1M | $15.00/1M |
About Claude Sonnet 4.5
- Creator
- Anthropic
- Context
- 200K
- Modalities
- text, image
- Knowledge cutoff
- Jan 2025
- Tool calling
- Yes
Claude Sonnet 4.5 on other providers
About Anthropic
Anthropic is an AI safety company that builds reliable, interpretable, and steerable AI systems. Operating as a public benefit corporation, Anthropic offers the Claude family of large language models via API, emphasizing responsible AI development through Constitutional AI.
Frequently Asked Questions
How much does Claude Sonnet 4.5 cost on Anthropic?
Anthropic serves Claude Sonnet 4.5 from $1.50 per 1M input tokens, across 2 tracked pricing modes. Prices are collected daily — see the table above for current input, output, and cached-input rates.
Is Anthropic the cheapest way to run Claude Sonnet 4.5?
Anthropic ranks #2 of 5 providers we track serving Claude Sonnet 4.5. The cheapest input price right now is on Velokey. Price is only one factor — throughput, latency, and context limits differ between providers.
Does Anthropic offer batch or cached pricing for Claude Sonnet 4.5?
We track 2 Claude Sonnet 4.5 offerings from Anthropic. Batch and cached-input rates appear in the table above when the provider publishes them; blank cells mean we have no current figure for that mode.