Model Comparison

Claude Opus 4.5OpenAI o3
Let's see who can write code better - Claude Opus 4.5 or OpenAI o3

Model Information

Claude Opus 4.5

Anthropic

Description

Most advanced Claude model with enhanced capabilities

Specifications

Context Window200K
Max Output8K
ReleasedNov 2025
API

Pricing (per 1M)

In / Out
$5/ $25

Key Features

State-of-the-art reasoningAdvanced code generationComplex problem solvingMulti-language supportVision capabilities

Strengths

  • More affordable than 4.1
  • Superior reasoning abilities
  • Excellent at complex tasks
  • Most advanced Claude model

Weaknesses

  • Higher cost
  • Slower response times
  • Overkill for simple tasks

Agent Support

No known agents

OpenAI o3

OpenAI

Description

Next generation reasoning model

Specifications

Context Window200K
Max Output100K
ReleasedMar 2025
API

Pricing (per 1M)

In / Out
$2/ $8

Key Features

Enhanced reasoningImproved capabilitiesBetter performance

Strengths

  • State-of-the-art reasoning
  • Improved over o1
  • Better efficiency

Weaknesses

  • Not yet released
  • Specifications unknown

Agent Support