Dictation quality now consistent; course corrections land reliably

Over the past few months, some dictations had formatting issues: course corrections that didn't land, words swapped for ones you didn't say, punctuation or edits getting ignored, and quality that varied session to session. A portion of dictations were being handled by older models, one too conservative on course correction and one too aggressive about changing words.

Both are now fixed. Everyone is on the same current model, so quality is consistent every time you speak. You'll notice:

• Cleaner course correction
• Fewer changes to words you said
• Punctuation and corrections that do what you tell them to

To keep it from recurring, we've added A/B testing and expanded benchmarks so every new model is tested against real usage before it ships.