Alternatives to Claude Sonnet 4

Options that appear in the same research papers as Claude Sonnet 4, by co-occurrence.

AlternativePapers (with Claude Sonnet 4)Avg viability
GPT-4o1
Gemini 2.5 Pro1
GPT-5.21
Claude Opus 4.51
Gemini 3 Flash1
Claude Haiku 4.51
GPT 5.11
ReACT1
Visual Studio Code1