Claude Opus 5.5

The author's favorite explanation is not generosity. Models are now swappable through routers like OpenRouter, and 29 hosts already serve one open DeepSeek model.

The thread's most practical answer came from a team that left for cheaper models over refusals.

Kimi K3.1 Pro has a 1-million-token context window and a Highspeed variant that runs 2-3 times faster. On Artificial Analysis's index it scores 55, fourth overall, while using 150M tokens against a median of 87M.

Moonshot also says it deliberately kept the open weights below its own pipeline's offensive-cyber capability.