Claude Opus 5.5 vs o3 Pro: Pricing Comparison
Compare pricing, capabilities, and costs for your LLM workloads.
Anthropic
Claude Opus 5.5
Pricing (per 1M tokens)
Input$4.00
Output$20.00
Cached Input$0.2000
Batch Input$2.00
Batch Output$10.00
Context & Output
Context Window1M tokens
Max Output128K tokens
Capabilities
Categoryflagship
Multimodaltext + image
Fine-tuningNo
StreamingYes
OpenAI
o3 Pro
Pricing (per 1M tokens)
Input$20.00
Output$80.00
Context & Output
Context Window200K tokens
Max Output100K tokens
Capabilities
Categoryflagship
Multimodaltext + image
Fine-tuningNo
StreamingYes
Quick Verdict
Cheaper Input Price
Claude Opus 5.5
80.0% cheaper
Cheaper Output Price
Claude Opus 5.5
75.0% cheaper
Larger Context Window
Claude Opus 5.5
+800K tokens
Cost Comparison
Sample workload: 1,000,000 input tokens + 1,000,000 output tokens
Claude Opus 5.5
$24.00
$4.00/1M input + $20.00/1M output
o3 Pro
$100.00
$20.00/1M input + $80.00/1M output
Claude Opus 5.5 is 76.0% cheaper for this workload.
Frequently Asked Questions
Which is cheaper, Claude Opus 5.5 or o3 Pro?
For input tokens, Claude Opus 5.5 is cheaper at $4.00 per 1M tokens. For output tokens, Claude Opus 5.5 is cheaper at $20.00 per 1M tokens. The overall cost depends on your workload's input/output ratio.
What is the context window size of Claude Opus 5.5 vs o3 Pro?
Claude Opus 5.5 has a context window of 1M tokens, while o3 Pro has 200K tokens. Claude Opus 5.5 supports a larger context window of 1M tokens, which is beneficial for processing longer documents.
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