Doubao-Seed-2.1

ByteDance's flagship refresh, announced at the 2026 Volcano Engine Force Conference in Pro and Turbo tiers. ByteDance positions Pro as crossing a "production-grade" threshold across code delivery, long-horizon agent tasks, multimodal understanding, and enterprise stability, claiming wins over Claude Opus 4.6 on several coding/agent/multimodal benchmarks at roughly 80% lower total cost of ownership (6¥/30¥ per million input/output tokens; Turbo at half). Closed, API-only via Volcano Engine; parameters undisclosed. The Doubao family was reported serving 180T+ tokens/day at announcement; Seedance 2.5 was teased for July.