Claude Sonnet 5 vs GPT-5.5 Pro: Pricing Comparison
Compare pricing, capabilities, and costs for your LLM workloads.
Anthropic
Claude Sonnet 5
Pricing (per 1M tokens)
Input$2.00
Output$10.00
Cached Input$0.2000
Batch Input$1.00
Batch Output$5.00
Context & Output
Context Window200K tokens
Max Output64K tokens
Capabilities
Categorymid
Multimodaltext + image
Fine-tuningNo
StreamingYes
OpenAI
GPT-5.5 Pro
Pricing (per 1M tokens)
Input$30.00
Output$180.00
Context & Output
Context Window1M tokens
Max Output128K tokens
Capabilities
Categoryflagship
Multimodaltext + image + audio
Fine-tuningNo
StreamingYes
Quick Verdict
Cheaper Input Price
Claude Sonnet 5
93.3% cheaper
Cheaper Output Price
Claude Sonnet 5
94.4% cheaper
Larger Context Window
GPT-5.5 Pro
+800K tokens
Cost Comparison
Sample workload: 1,000,000 input tokens + 1,000,000 output tokens
Claude Sonnet 5
$12.00
$2.00/1M input + $10.00/1M output
GPT-5.5 Pro
$210.00
$30.00/1M input + $180.00/1M output
Claude Sonnet 5 is 94.3% cheaper for this workload.
Frequently Asked Questions
Which is cheaper, Claude Sonnet 5 or GPT-5.5 Pro?
For input tokens, Claude Sonnet 5 is cheaper at $2.00 per 1M tokens. For output tokens, Claude Sonnet 5 is cheaper at $10.00 per 1M tokens. The overall cost depends on your workload's input/output ratio.
What is the context window size of Claude Sonnet 5 vs GPT-5.5 Pro?
Claude Sonnet 5 has a context window of 200K tokens, while GPT-5.5 Pro has 1M tokens. GPT-5.5 Pro supports a larger context window of 1M tokens, which is beneficial for processing longer documents.
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