GPT-4o mini vs Claude Sonnet 4

Compare GPT-4o mini by OpenAI against Claude Sonnet 4 by Anthropic, context windows of 128K vs 200K, tested across 25 shared challenges. Updated April 2026.

Which is better, GPT-4o mini or Claude Sonnet 4?

GPT-4o mini and Claude Sonnet 4 are both competitive models. GPT-4o mini costs $0.15/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4o mini and Claude Sonnet 4

GPT-4o mini is made by openai while Claude Sonnet 4 is from anthropic. GPT-4o mini has a 128K token context window compared to Claude Sonnet 4's 200K. On pricing, GPT-4o mini costs $0.15/M input tokens vs $3/M for Claude Sonnet 4.

Our Verdict
Claude Sonnet 4
Claude Sonnet 4
GPT-4o mini
GPT-4o miniRunner-up

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

GPT-4o mini is 25x cheaper per token — worth considering if cost matters.

Slight edge
Writing DNA

Style Comparison

Similarity
94%

Claude Sonnet 4 uses 87.9x more emoji

GPT-4o mini
Claude Sonnet 4
54%Vocabulary62%
18wSentence Length111w
0.84Hedging0.40
3.8Bold5.0
3.3Lists9.3
0.00Emoji0.88
1.03Headings2.16
0.23Transitions0.33
Based on 22 + 17 text responses
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GPT-4o miniClaude Sonnet 4

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