Two AI APIs shut down this weekend: Perplexity Sonar (Sep 27) and Appsmith AI (Sep 30)

Perplexity retires its Sonar API tiers on September 27, 2026, replacing them with the Agent API that bills per tool invocation. Appsmith shuts down its managed Appsmith AI plugin on September 30, forcing a BYOK migration.

• Sonar maps to Agent API presets: sonar → fast, sonar-pro → low, sonar-reasoning-pro → medium
• Agent API bills per tool call: web_search $2.50, finance_search $5 per 1,000 invocations
• Agent API rate limits cap at Tier 4: $1,000 and $5,000 both give 33 queries per second
• Appsmith AI shuts down September 30; uploaded file context cannot be transferred