GPT-3.5 Turbo vs Claude Sonnet 4

Compare GPT-3.5 Turbo by OpenAI against Claude Sonnet 4 by Anthropic, context windows of 16K vs 200K, tested across 14 shared challenges. Updated April 2026.

Which is better, GPT-3.5 Turbo or Claude Sonnet 4?

GPT-3.5 Turbo and Claude Sonnet 4 are both competitive models. GPT-3.5 Turbo costs $1.5/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 16K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-3.5 Turbo and Claude Sonnet 4

GPT-3.5 Turbo is made by openai while Claude Sonnet 4 is from anthropic. GPT-3.5 Turbo has a 16K token context window compared to Claude Sonnet 4's 200K. On pricing, GPT-3.5 Turbo costs $1.5/M input tokens vs $3/M for Claude Sonnet 4.

Our Verdict
Claude Sonnet 4
Claude Sonnet 4
GPT-3.5 Turbo
GPT-3.5 TurboRunner-up

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

GPT-3.5 Turbo is 7.5x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
64%

Claude Sonnet 4 uses 503.7x more bold

GPT-3.5 Turbo
Claude Sonnet 4
61%Vocabulary62%
16wSentence Length111w
0.23Hedging0.40
0.0Bold5.0
3.7Lists9.3
0.00Emoji0.88
0.00Headings2.16
0.38Transitions0.33
Based on 11 + 17 text responses
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GPT-3.5 TurboClaude Sonnet 4

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