Claude 3 Opus vs GPT-5
Compare Claude 3 Opus by Anthropic against GPT-5 by OpenAI, context windows of 200K vs 400K, tested across 12 shared challenges. Updated May 2026.
Which is better, Claude 3 Opus or GPT-5?
Claude 3 Opus and GPT-5 are both competitive models. Claude 3 Opus costs $15/M input tokens vs $1.25/M for GPT-5. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3 Opus and GPT-5
Claude 3 Opus is made by anthropic while GPT-5 is from openai. Claude 3 Opus has a 200K token context window compared to GPT-5's 400K. On pricing, Claude 3 Opus costs $15/M input tokens vs $1.25/M for GPT-5.
Per 1M tokens
GPT-5 is cheaper on both — 12× input, 7.5× output
No community votes yet. On paper, GPT-5 has the edge — newer, bigger context window.
GPT-5 is 7.5x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-5 uses 18.9x more bold
