3.1.0 (2026-08-14) Features api: add WebSocket stream IDs ( #3612 ) ( d9029e3 ) api: add workload identity access token issued event ( #3601 ) ( df274d4 ) api: deprecate Sora video APIs ( #3610 ) ( 721cb1c ) api: Ultrafast tier, structured MCP and websocket errors, separate websocket events ( #3617 ) ( f38355e ) Chores remove Stainless attribution and infrastructure ( #3599 ) ( a1eeab5 )
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