Claude Sonnet 4.5 vs Claude Opus 4.5: Pricing Comparison
Compare pricing, capabilities, and costs for your LLM workloads.
Anthropic
Claude Sonnet 4.5
Pricing (per 1M tokens)
Input$3.00
Output$15.00
Cached Input$0.3000
Batch Input$1.50
Batch Output$7.50
Context & Output
Context Window200K tokens
Max Output64K tokens
Capabilities
Categorymid
Multimodaltext + image
Fine-tuningNo
StreamingYes
Anthropic
Claude Opus 4.5
Pricing (per 1M tokens)
Input$5.00
Output$25.00
Cached Input$0.5000
Batch Input$2.50
Batch Output$12.50
Context & Output
Context Window200K tokens
Max Output64K tokens
Capabilities
Categoryflagship
Multimodaltext + image
Fine-tuningNo
StreamingYes
Quick Verdict
Cheaper Input Price
Claude Sonnet 4.5
40.0% cheaper
Cheaper Output Price
Claude Sonnet 4.5
40.0% cheaper
Larger Context Window
Claude Opus 4.5
+0 tokens
Cost Comparison
Sample workload: 1,000,000 input tokens + 1,000,000 output tokens
Claude Sonnet 4.5
$18.00
$3.00/1M input + $15.00/1M output
Claude Opus 4.5
$30.00
$5.00/1M input + $25.00/1M output
Claude Sonnet 4.5 is 40.0% cheaper for this workload.
Frequently Asked Questions
Which is cheaper, Claude Sonnet 4.5 or Claude Opus 4.5?
For input tokens, Claude Sonnet 4.5 is cheaper at $3.00 per 1M tokens. For output tokens, Claude Sonnet 4.5 is cheaper at $15.00 per 1M tokens. The overall cost depends on your workload's input/output ratio.
What is the context window size of Claude Sonnet 4.5 vs Claude Opus 4.5?
Claude Sonnet 4.5 has a context window of 200K tokens, while Claude Opus 4.5 has 200K tokens. Claude Sonnet 4.5 supports a larger context window of 200K tokens, which is beneficial for processing longer documents.
How do Claude Sonnet 4.5 and Claude Opus 4.5 compare for batch processing?
Both models support batch processing with discounted rates. Claude Sonnet 4.5 offers a better batch rate at $1.50 per 1M input tokens. Batch processing is ideal for non-time-sensitive workloads where you can wait for processing.
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