Rival
Sign Up

GPT-4o (Omni) vs Claude Sonnet 4.6

Compare GPT-4o (Omni) by OpenAI against Claude Sonnet 4.6 by Anthropic, context windows of 128K vs 1.0M, tested across 52 shared challenges. Updated April 2026.

Which is better, GPT-4o (Omni) or Claude Sonnet 4.6?

GPT-4o (Omni) and Claude Sonnet 4.6 are both competitive models. GPT-4o (Omni) costs $2.5/M input tokens vs $3/M for Claude Sonnet 4.6. Context windows: 128K vs 1000K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4o (Omni) and Claude Sonnet 4.6

GPT-4o (Omni) is made by openai while Claude Sonnet 4.6 is from anthropic. GPT-4o (Omni) has a 128K token context window compared to Claude Sonnet 4.6's 1000K. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $3/M for Claude Sonnet 4.6.

Our Verdict
GPT-4o (Omni)
GPT-4o (Omni)
Claude Sonnet 4.6
Claude Sonnet 4.6

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

GPT-4o (Omni) uses 13.5x more transitions

GPT-4o (Omni)
Claude Sonnet 4.6
54%Vocabulary56%
18wSentence Length36w
0.72Hedging0.53
7.3Bold5.1
5.6Lists3.4
0.03Emoji0.19
1.40Headings2.10
0.26Transitions0.02
Based on 24 + 23 text responses
vs

Ask them anything yourself

GPT-4o (Omni)Claude Sonnet 4.6
FAQ
Keep going
Claude Sonnet 4.6 logoGPT-5 logo
Claude Sonnet 4.6 vs GPT-5Cross-provider
GPT-4o (Omni) logoLlama 4 Maverick logo
GPT-4o (Omni) vs Llama 4 MaverickNew provider
GPT-4o (Omni) logoMiniMax M2.5 logo
GPT-4o (Omni) vs MiniMax M2.5New provider