Claude 2 vs GPT-5

Compare Claude 2 by Anthropic against GPT-5 by OpenAI, context windows of 100K vs 400K, tested across 5 shared challenges. Updated April 2026.

Which is better, Claude 2 or GPT-5?

Claude 2 and GPT-5 are both competitive models. Claude 2 costs $11.02/M input tokens vs $1.25/M for GPT-5. Context windows: 100K vs 400K tokens. Compare their real outputs side by side below.

Key Differences Between Claude 2 and GPT-5

Claude 2 is made by anthropic while GPT-5 is from openai. Claude 2 has a 100K token context window compared to GPT-5's 400K. On pricing, Claude 2 costs $11.02/M input tokens vs $1.25/M for GPT-5.

Our Verdict
GPT-5
GPT-5
Claude 2
Claude 2Runner-up

No community votes yet. On paper, GPT-5 has the edge — bigger model tier, newer, bigger context window.

GPT-5 is 3.3x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
100%

GPT-5 uses 19.5x more hedging

Claude 2
GPT-5
65%Vocabulary65%
13wSentence Length13w
0.00Hedging0.20
0.0Bold0.2
10.2Lists4.6
0.00Emoji0.00
0.00Headings0.16
0.00Transitions0.03
Based on 2 + 16 text responses
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Claude 2GPT-5

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
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