Claude Opus 4.6 vs GPT-4

Compare Claude Opus 4.6 by Anthropic against GPT-4 by OpenAI, context windows of 1.0M vs 8K, tested across 21 shared challenges. Updated April 2026.

Which is better, Claude Opus 4.6 or GPT-4?

Claude Opus 4.6 and GPT-4 are both competitive models. Claude Opus 4.6 costs $5/M input tokens vs $30/M for GPT-4. Context windows: 1000K vs 8K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.6 and GPT-4

Claude Opus 4.6 is made by anthropic while GPT-4 is from openai. Claude Opus 4.6 has a 1000K token context window compared to GPT-4's 8K. On pricing, Claude Opus 4.6 costs $5/M input tokens vs $30/M for GPT-4.

Our Verdict
Claude Opus 4.6
Claude Opus 4.6
GPT-4
GPT-4Runner-up

No community votes yet. On paper, Claude Opus 4.6 has the edge — newer, bigger context window.

Too close to call
Writing DNA

Style Comparison

Similarity
85%

Claude Opus 4.6 uses 20.7x more emoji

Claude Opus 4.6
GPT-4
53%Vocabulary59%
35wSentence Length18w
0.68Hedging1.10
5.2Bold0.8
2.9Lists2.5
0.21Emoji0.00
1.34Headings0.00
0.03Transitions0.45
Based on 23 + 15 text responses
vs

Ask them anything yourself

Claude Opus 4.6GPT-4

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
FAQ

Common questions