Claude Opus 4.1 vs GPT-3.5 Turbo

Compare Claude Opus 4.1 by Anthropic against GPT-3.5 Turbo by OpenAI, context windows of 200K vs 16K, tested across 10 shared challenges. Updated April 2026.

Which is better, Claude Opus 4.1 or GPT-3.5 Turbo?

Claude Opus 4.1 and GPT-3.5 Turbo are both competitive models. Claude Opus 4.1 costs $15/M input tokens vs $1.5/M for GPT-3.5 Turbo. Context windows: 200K vs 16K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.1 and GPT-3.5 Turbo

Claude Opus 4.1 is made by anthropic while GPT-3.5 Turbo is from openai. Claude Opus 4.1 has a 200K token context window compared to GPT-3.5 Turbo's 16K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $1.5/M for GPT-3.5 Turbo.

Our Verdict
Claude Opus 4.1
Claude Opus 4.1
GPT-3.5 Turbo
GPT-3.5 TurboRunner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, newer, bigger context window.

GPT-3.5 Turbo is 38x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
64%

Claude Opus 4.1 uses 509.5x more bold

Claude Opus 4.1
GPT-3.5 Turbo
61%Vocabulary61%
87wSentence Length16w
0.54Hedging0.23
5.1Bold0.0
6.7Lists3.7
0.38Emoji0.00
1.68Headings0.00
0.13Transitions0.38
Based on 17 + 11 text responses
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Claude Opus 4.1GPT-3.5 Turbo

279 AI models invented the same fake scientist.

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AI Hallucination Index 2026
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