Seed 2.1 Turbo

The LLMBase catalog page lists Seed 2.1 Turbo as a ByteDance Seed model with a 262,144-token context window, text-only modality, a stated release date of Aug 12, 2026, and pricing of $0.50 per million input tokens and $2.50 per million output tokens. The page also notes that the model is not currently available in LLMB Several inconsistencies are visible in the supplied excerpt: the page's prose introduction describes Seed 2.1 Turbo as multimodal (for coding and long-horizon agent workflows with visual and other capabilities), while the structured specifications list modalities as "Text" only. The Aug 12, 2026 release date also confl

ByteDance released Seed 2.1 Pro and Seed 2.1 Turbo on 24 June 2026 at the Volcano Engine FORCE conference as a two-model family aimed at agent-driven enterprise work, distributed through ByteDance's Volcano Engine cloud and Volcano Ark model service. Seed 2.1 Turbo is positioned as a faster, lower-cost variant for high ByteDance reports that Seed 2.1 Pro achieves leading scores on Terminal Bench 2.1, SWE-Pro, and SciCode for code generation, and leads OSWorld, MobileWorld, and MMMU-Pro for agent and multimodal tasks, with a stated total cost of ownership close to 80% lower than Claude Opus 4.6. The article frames Seed 2.1 Pro as outp

Seed 2.1 Pro is the flagship in ByteDance's Doubao Seed 2.1 family, announced at the Volcano Engine FORCE conference on June 24, 2026 and offered through Volcano Engine's API alongside the smaller Seed 2.1 Turbo. The model targets long-horizon productivity work across coding, tool use, and multimodal reasoning rather t Seed 2.1 Pro is served via ByteDance's Volcano Engine API under model id doubao-seed-2-1-pro-260628 and powers the Doubao assistant, with weights unpublished and a proprietary, API-only distribution model. The reported benchmark table includes dedicated Seed 2.1 Turbo columns showing, among others, KINA at 46.6%, Super

Seed 2.1 Turbo was released on June 24, 2026 by ByteDance, as tracked on the dedicated model profile page. The model is released under a Proprietary license with hosted-only access, and its provider documentation points to seed.bytedance.com, where ByteDance published the official Seed 2.1 launch post covering architec The model card positions Seed 2.1 Turbo against several frontier and efficiency-tier peers for comparison, including GLM-5.1, Claude Opus 4.6, GPT-5.2, GPT-5.5 Instant, Qwen3.8 Max, and Qwen3.7-Plus. It categorizes Seed 2.1 Turbo within capability tiers spanning reasoning, coding, tool calling, long context, vision, ma

ByteDance added Seed 2.1 Turbo to its Volcano Engine platform as part of the Seed 2.1 large language model family first announced at the Volcano Engine FORCE conference in late June 2026. On Volcano Ark, the model is identified by the explicit API endpoint doubao-seed-2-1-turbo-260628, which directly matches the subjec The Turbo release emphasizes three upgrade directions shared across the family: coding engineering delivery, agent long-chain task execution, and multimodal understanding, including stronger visual understanding, spatial reasoning, and long-context processing alongside state-of-the-art video understanding results. Byte

Seed 2.1 Turbo (internally Doubao-Seed-2.1-Turbo) is ByteDance's cost-optimized production model in the Seed 2.1 family, released in June 2026 as a lighter counterpart to Seed 2.1 Pro. ByteDance designed the generation around end-to-end coding delivery, long-chain agent task execution, and multimodal understanding, and ByteDance claims the Seed 2.1 series matches GPT-5.5 across coding, agent, and multimodal tasks, but HokAI explicitly notes this is a vendor claim with no independent verification published at launch, and that no Turbo-specific scores on SWE-bench Verified, GPQA Diamond, AIME 2025, or MMLU-Pro have been released. Early

A third-party DataNorth analysis on Tabbit, dated the day after launch (2026-06-24), examines ByteDance's Seed 2.1 Pro/Turbo pair and reports launch-time online pricing of RMB 6 per million input tokens, RMB 30 per million output tokens, and RMB 1.2 (truncated in the excerpt). The article also documents that ByteDance The article separately highlights an external signal: a Seed 2.1 Preview entry placed eighth on the Code Arena Frontend Preview leaderboard with a score of 1539, which the authors explicitly caveat as a narrow frontend-task indicator rather than a measure of overall coding ability. It also flags that reproducible reque