Claude Opus 4.5 vs o1-pro Comparison
Comparing Claude Opus 4.5 and o1-pro across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
Claude Opus 4.5 outperforms in 1 benchmarks (GPQA), while o1-pro is better at 0 benchmarks.
Claude Opus 4.5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
Cost data unavailable.
Context Window
Maximum input and output token capacity
Only Claude Opus 4.5 specifies input context (200,000 tokens). Only Claude Opus 4.5 specifies output context (64,000 tokens).
Input Capabilities
Supported data types and modalities
Both Claude Opus 4.5 and o1-pro support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Opus 4.5
o1-pro
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Opus 4.5 was released on 2025-11-24, while o1-pro was released on 2024-12-17.
Claude Opus 4.5 is 11 months newer than o1-pro.
Nov 24, 2025
3 months ago
11mo newerDec 17, 2024
1.2 years ago
Knowledge Cutoff
When training data ends
Claude Opus 4.5 has a knowledge cutoff of 2025-03-31, while o1-pro has a cutoff of 2023-09-30.
Claude Opus 4.5 has more recent training data (up to 2025-03-31), making it potentially better informed about events through that date compared to o1-pro (2023-09-30).
Mar 2025
1.5 yr newerSep 2023
Outputs Comparison
Key Takeaways
Claude Opus 4.5
View detailsAnthropic
o1-pro
View detailsOpenAI
Detailed Comparison
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