openai logo
o1-pro
vs
anthropic logo
Claude Sonnet 4.5

Compare performance metrics, pricing, and capabilities of these AI models.

Key Differences
Context Length
Lower
o1-pro: 200K (disadvantage)
Claude Sonnet 4.5: 1.0M (advantage)
Cost Efficiency
Higher Cost
Prompt: $150.00M vs $3.00M
Completion: $600.00M vs $15.00M

Capabilities

o1-pro
Modality: text+image->text
Inputs: text, image, file
Claude Sonnet 4.5
Modality: text+image->text
Inputs: text, image, file
O
o1-pro
openai/o1-pro

The o1 series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o1-pro model uses more ...

Context Length200K
Prompt Price$150.00M
ReleasedMarch 19, 2025
Supports:
text+image->text
A
Claude Sonnet 4.5
anthropic/claude-sonnet-4.5

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-ar...

Context Length1.0M
Prompt Price$3.00M
ReleasedSeptember 29, 2025
Supports:
text+image->text
Detailed Comparison
Feature
openai logo
o1-pro
anthropic logo
Claude Sonnet 4.5
Context Length200K1.0M
Prompt Price$150.00M$3.00M
Completion Price$600.00M$15.00M
Modalitytext+image->texttext+image->text
Release DateMarch 19, 2025September 29, 2025
Analysis & Recommendations

Quick Summary

This comparison reveals key trade-offs between o1-pro and Claude Sonnet 4.5. Claude Sonnet 4.5 offers a larger context window of 1.0M compared to o1-pro's 200K, though o1-pro comes at a higher cost.

o1-pro Strengths

  • Competitive context size (200K)
  • Premium pricing for high-quality output
  • Multimodal capabilities for image analysis
  • Proven and stable model

Claude Sonnet 4.5 Strengths

  • Larger context window (1.0M) for processing longer documents
  • More cost-effective per token
  • Multimodal capabilities for image analysis
  • Latest generation model

When to Use Each Model

Choose o1-pro when:
  • • You need competitive context capability for complex tasks
  • • Cost efficiency is not the primary concern in your use case
  • • Working with images and text that benefit from deep analysis
Choose Claude Sonnet 4.5 when:
  • • You need the larger context window for long-form content
  • • Cost efficiency is important for your budget
  • • Working with images and text that require careful analysis
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