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GPT-5.4 (max) vs Claude 4.5 Opus

Detailed comparison of capabilities, features, and performance.

GPT-5.4 (max)

GPT-5.4 (max)

OpenAI
VS
Claude 4.5 Opus

Claude 4.5 Opus

Anthropic
Feature GPT-5.4 (max) Claude 4.5 Opus
AI Lab OpenAI Anthropic
Context Size 1,050,000 tokens 200,000 tokens
Max Output Size 128,000 tokens 64,000 tokens
Frontier Model Yes Yes
Vision Support Yes Yes
Description OpenAI's frontier model configured with high reasoning effort for complex professional tasks. The latest Opus 4.5 model from Anthropic

Learn more about GPT-5.4 (max)

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Learn more about Claude 4.5 Opus

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