According to Anthropic, "Claude Sonnet 4.6 is our most capable Sonnet model yet." The company says Sonnet 4.6 has a 1 million ...
Anthropic is positioning Sonnet 4.6 as a practical daily driver. In many cases, it's even faster than Opus 4.6.
OpenAI has recently published a detailed architecture description of the Codex App Server, a bidirectional protocol that decouples the Codex coding agent's core logic from its various client surfaces.