Sonnet 5's Sept 1 price hike is cancelled as intro deadline hits
The $2/$10 intro rate was set to jump 50% to $3/$15 tomorrow; Anthropic made it permanent. Where that leaves Sonnet 5 vs Gemini and GPT-5.6 on cost.
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What changes at midnight: nothing
Sonnet 5's introductory $2/$10 per-million-token rate was scheduled to end Aug 31 and rise to $3/$15 on Sept 1. Anthropic's pricing page now lists $2/$10 as the standard rate and states the increase “will not occur” — so your API bills don't move tomorrow.
Two headlines, one answer
Trackers still flag an Aug 31 “deadline” and some outlets reported a confirmed 50% hike, but Anthropic reversed course weeks ago and froze the intro price. If you set a Sept 1 budget alert for Sonnet 5, you can clear it.
Where $2/$10 leaves Sonnet 5 on price
At $2/$10, Sonnet 5 undercuts GPT-5.6 Terra ($2.50/$15) on both sides and sits above Gemini 3.7 Flash's intro rate ($0.75/$3.75, through Dec 31). For agent loops dominated by output tokens, Sonnet 5's frozen $10 output price is the number to watch.