GPT-2 vs Claude Opus 4

Compare GPT-2 by OpenAI against Claude Opus 4 by Anthropic, context windows of 1K vs 200K, tested across 6 shared challenges. Updated April 2026.

Which is better, GPT-2 or Claude Opus 4?

GPT-2 and Claude Opus 4 are both competitive models. Context windows: 1K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-2 and Claude Opus 4

GPT-2 is made by openai while Claude Opus 4 is from anthropic. GPT-2 has a 1K token context window compared to Claude Opus 4's 200K.

Our Verdict
Claude Opus 4
Claude Opus 4
GPT-2
GPT-2Runner-up

No community votes yet. On paper, Claude Opus 4 has the edge — bigger model tier, newer, bigger context window.

Slight edge
Writing DNA

Style Comparison

Similarity
68%

Claude Opus 4 uses 52.1x more hedging

GPT-2
Claude Opus 4
48%Vocabulary64%
36wSentence Length62w
0.00Hedging0.52
0.0Bold4.4
0.0Lists9.1
0.00Emoji0.11
0.00Headings1.87
0.00Transitions0.27
Based on 7 + 16 text responses
vs

Ask them anything yourself

GPT-2Claude Opus 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