Best Alternatives to OpenAI: GPT-5.1-Codex
20 alternatives ranked by real usage data. OpenAI: GPT-5.1-Codex scores 23/100 — 20 tools score higher.
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....