Claude Sonnet 5.5 and GPT-6.1 Sol with fast and ultrafast tiers
Claude Sonnet 5.5 (claude-sonnet-5-5, plus a [1m] 1M-context twin) is
seeded as an enabled Anthropic favorite. It always thinks, so an explicit
none effort sends low.
GPT-6.1 Sol joins the OpenAI models. Its controls.speed setting accepts
fast and ultrafast. The OpenAI drivers reject a speed tier the model does
not list before sending, and usage is priced at the tier that served the call.
Anthropic sunset Claude Sonnet 4.5, so its model profile and catalog entry are removed.