Claude API no longer bills requests that return stop_reason refusal without generated output.

Refusals without output no longer carry request cost, so refusal handling belongs in billing-aware API paths.

This sits with Streaming refusals guidance: detect stop_reason refusal and handle zero-output refusals separately from generated responses.

• Jun 11, 2026OpenAI modelcard diff shows the API docs navigation content removed.
• Jun 11, 2026OpenAI pricing page removed visible API pricing content for GPT-5.5, GPT-5.4, and realtime.
• Jun 11, 2026Anthropic launched Claude Fable 5 and Claude Mythos 5 with 1M context and 128k max output.

This is the world we build in. It moves this fast. We move with it.