Seed 2.1 Turbo

Seed 2.1 Turbo (internally designated Doubao-Seed-2.1-Turbo) is ByteDance's cost-optimized production model in the Seed 2.1 family, released in June 2026 alongside the flagship Seed 2.1 Pro. The generation targets three goals: end-to-end coding delivery from requirements through validation, long-chain agent task execut The page explicitly notes that ByteDance's claim of parity with GPT-5.5 across coding, agent, and multimodal tasks has no independent verification published at launch, and no Turbo-specific scores on SWE-bench Verified, GPQA Diamond, AIME 2025, or MMLU-Pro have been released. ByteDance has not confirmed a public contex

ByteDance released the Seed 2.1 family, including Seed 2.1 Turbo, on 24 June 2026 at the Volcano Engine FORCE conference, with both variants distributed through ByteDance's Volcano Engine cloud and Volcano Ark model service. Seed 2.1 Turbo is positioned as the faster, lower-cost variant built for high-frequency enterpr 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. The company claims Seed 2.1 Pro outperforms Claude Opus 4.6 on several coding, agent, and multimodal benchmarks while

AI/TLDR's Seed 2.1 Pro entry provides the most complete Seed 2.1 Turbo benchmark comparison in the candidate set, drawn from the ByteDance Seed 2.1 page. Reported Seed 2.1 Turbo scores include Terminal Bench 2.1 67.6%, SWE-Atlas 30.6%, MathVision with tool 92.7%, MMMU-Pro with tool 82.2%, WorldVQA 48.6%, ZEROBench with The same table positions Seed 2.1 Turbo as the smaller, faster sibling to Seed 2.1 Pro within ByteDance's proprietary, API-only Seed 2.1 line, generally available since 24 June 2026 with text, vision, and video modalities. As with the family announcement, these Turbo figures are presented as ByteDance Seed team's self-

Seed 2.1 Turbo ranks 42nd on the LLM Stats composite score, with capability tiers tracked across reasoning (56 models), vision (45), multimodal (42), agents (32), and code categories. Specific benchmark scores recorded include CharXiv-D at 0.95 (rank 2), MathVision at 0.93 with tools (rank 7), MathVista at 0.91 (rank 2 All scores on the LLM Stats page are explicitly labeled as self-reported by the model provider (seed.bytedance.com) and may not be independently verified. The page lists 86 additional benchmarks in its dataset section for Seed 2.1 Turbo, indicating broad but provider-sourced evaluation coverage. Users should treat the

ByteDance released Seed 2.1 Turbo on August 10, 2026 according to this report, extending the Seed 2.1 family first announced at the Volcano Engine FORCE conference in late June (note: release-date conflict with other sources reporting June 23-24). The two-variant family positions Pro as the flagship reasoning model and ByteDance's launch materials describe Seed 2.1 as the next-generation large model designed for the Coding and Agent era, targeting complex engineering delivery and large-scale production with upgrades in coding engineering delivery, agent long-chain task execution, and multimodal understanding, including state-of-the-a

AZ Labs reports that ByteDance released Seed 2.1 Turbo on 23 June 2026, and that an OpenRouter route for the model was first observed by its AIMI monitoring at 16:01:03 UTC on 12 August 2026. The OpenRouter listing at openrouter/bytedance-seed/seed-2.1-turbo exposes a 262,144-token context window with a matching 262,14 The detailed route block lists pricing of $0.20 input / $0.60 output per million tokens, while the page header cites $0.50 per million input tokens — a discrepancy in the source itself. Verified capability tags include reasoning/thinking, function calling and tools, structured JSON output, and token streaming. As a gat