How much cheaper is Claude Opus 4.8 than GPT-5.4 Pro?

Claude Opus 4.8 costs $5/$25 per 1M tokens while GPT-5.4 Pro costs $30/$180. That's 83% cheaper on input and 86% cheaper on output.

Are both models in the same quality tier?

Both are premium-tier models. GPT-5.4 Pro is OpenAI's most capable reasoning model; Opus 4.8 is Anthropic's flagship. The 83-86% price difference makes Opus 4.8 significantly better value.

When should I choose GPT-5.4 Pro over Claude Opus 4.8?

Choose GPT-5.4 Pro only when you need OpenAI's maximum reasoning capability. For all other premium use cases, Opus 4.8 delivers comparable quality at 83-86% lower cost.

What's the context window difference?

Opus 4.8 has a 1M context window, 2.5x larger than GPT-5.4 Pro's 400K. Opus handles longer documents and codebases better.

GPT-5.4 Pro vs Claude Opus 4.8 — Premium AI Model Pricing Comparison 2026

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