Overview
Doubao 2.1 Pro (Doubao-Seed 2.1 Pro) is a new-generation flagship model officially released by ByteDance's Volcano Engine at the FORCE Original Power Conference on 2026-06-23. It marks ByteDance's transition from a "model provider" to an "AI ecosystem platform." Pro coding capabilities are on par with Claude Opus 4.7, and overall performance rivals GPT-5.5 / Gemini 3.1 Pro—this is the first time a domestic model has entered the international top-tier closed-source flagship range in long-range coding and general benchmarks.
Core capabilities boil down to two things: autonomously advancing a complete engineering project for 10+ consecutive hours (at the level of chip RTL design and full-stack software projects) + watching a 2-hour video and performing end-to-end editing—the latter is the first domestic model to string together long video understanding and editing into a complete workflow.
On 2026-09-16 the model was upgraded to Doubao-Seed-2.1-Pro-0915, targeting production-grade enterprise needs with stronger multimodal coding and understanding. Sketches, screen recordings and design files convert directly into runnable code, and four design images are enough to rebuild an interactive 3D scene in stages. On a 387,000-line open-source game repository, 83% of historical development tasks produced mergeable engineering deliverables; on a 280,000-line legacy Java ERP system it produced three mobile pages totalling about 2,000 lines in roughly two hours and ran the full purchase-to-inventory flow. The API is fully live on Volcano Ark, Doubao Work has adopted it, and Doubao-Seed-Evolving was updated to the same version.
Pricing is the highlight of this release: Pro input ¥6 / output ¥30 per million tokens (cache hit ¥1.2), Turbo is half the price of Pro, overall usage cost is nearly 80% lower than the Claude Opus 4.6-4.8 series—ByteDance officially states "computational cost for the same task is nearly 80% lower than overseas closed-source models." Combined with Doubao's daily token call volume of 180 trillion (a 1500x increase in two years) and public cloud market share rising to 49.5%, the dual fronts of price and scale squeeze overseas closed-source models.
This is a landmark event in 2026—"ByteDance flips the table"—36Kr's headline that day directly read "ByteDance flips the table, Doubao 2.1 costs slashed by 80%."
Key Features
- Coding on par with Opus 4.7: Pro coding capabilities are on par with Claude Opus 4.7, the first time a domestic model enters the international top-tier closed-source flagship range
- 10+ hour autonomous engineering: Can autonomously advance a complete engineering project for 10+ consecutive hours (at the level of chip RTL design and full-stack software projects)
- Watch 2-hour video + end-to-end editing: Can watch a 2-hour video and directly perform end-to-end editing, the first domestic model to string together long video understanding and editing into a workflow
- Cost reduced by nearly 80%: Overall usage cost is nearly 80% lower than the Opus 4.6-4.8 series, benefiting from ByteDance's self-developed models and proprietary computing power
- Three tiers (Pro/Turbo/Seed-Evolving): Pro flagship, Turbo cost-effective, Seed-Evolving continuous learning version, covering all scenarios
- Multimodal depth: Significantly improved accuracy in image-text, screenshot, and table parsing; interleaved reasoning across images/video/text
- 180 trillion daily token scale: Doubao's daily token call volume is 180 trillion, a 1500x increase in two years, with 49.5% public cloud market share
- FORCE ecosystem family bucket: Released simultaneously with Seedance 2.5 (video) + Seedream 5.0 (image) + Doubao Audio 1.0, forming a multimodal synergy matrix
- Seed-2.1-Pro-0915 upgrade (2026-09-16): Upgraded to Doubao-Seed-2.1-Pro-0915 targeting production-grade enterprise needs with stronger multimodal coding and understanding; sketches, screen recordings and design files convert directly into runnable code, and four design images are enough to rebuild an interactive 3D scene in stages
- Production-grade engineering deliverables: On a 387,000-line open-source game repository, 83% of historical development tasks produced mergeable engineering deliverables; on a 280,000-line legacy Java ERP system it produced three mobile pages totalling about 2,000 lines in roughly two hours and ran the full purchase-to-inventory flow
- Live on Volcano Ark and Doubao Work: The API is fully live on Volcano Ark, Doubao Work has adopted it, and Doubao-Seed-Evolving was updated to the same version
Use Cases
- 10+ hour long-range coding tasks (replacing Claude Code + Opus 4.7 backend)
- Chip RTL design, full-stack software project-level autonomous engineering
- Long video understanding + end-to-end editing (film pre-production, educational courses, training videos)
- Cost-sensitive SME AI platform selection
- Domestic model replacement in state-owned enterprises / Xinchuang scenarios
- Default upgrade for deep users of ByteDance Volcano Engine / Feishu ecosystem
- Production-grade enterprise development: converting sketches, screen recordings and design files directly into runnable code
- Rebuilding interactive 3D scenes from design images in stages
- Legacy system modernization, such as mobile pages and purchase-to-inventory flows on a legacy Java ERP
Pros
- Coding on par with Opus 4.7, overall performance rivals GPT-5.5 / Gemini 3.1 Pro
- Cost reduced by nearly 80%, the most impactful move in the 2026 domestic large model price war
- The combination of 10+ hour autonomous engineering + 2-hour video editing is unique domestically
- 180 trillion daily tokens validates product scalability
- Three tiers (Pro/Turbo/Seed-Evolving) cover all scenarios
- FORCE ecosystem family bucket (video + image + audio + coding) synergy
- 2026-09-16 upgrade to Doubao-Seed-2.1-Pro-0915 strengthens multimodal coding and understanding for production-grade enterprise needs
- Proven engineering deliverables: 83% mergeable output on a 387,000-line game repository, and a full purchase-to-inventory flow on a 280,000-line legacy Java ERP
- API fully live on Volcano Ark, adopted by Doubao Work, with Doubao-Seed-Evolving updated to the same version
Pricing
Pro: Input ¥6/M token, Output ¥30/M token, Cache hit ¥1.2/M.\nTurbo: Half the price of Pro.\nOverall cost nearly 80% lower than the Opus 4.6-4.8 series.\nAccessed via Volcano Engine / Doubao API / Feishu AI.
Summary
Doubao 2.1 Pro is a landmark event in 2026—"ByteDance flips the table"—coding on par with Opus 4.7 + 10+ hour autonomous engineering + watch 2-hour video editing + cost reduced by nearly 80% gives it real competitiveness against overseas closed-source flagships. The 2026-09-16 upgrade to Doubao-Seed-2.1-Pro-0915 pushes it further toward production-grade enterprise needs, with stronger multimodal coding and understanding that turns sketches, screen recordings and design files directly into runnable code. If you work on long-range coding or long video content, Doubao 2.1 Pro is one of the most worth-trying domestic options; if you are a deep user of ByteDance Volcano Engine / Feishu ecosystem, it's almost a no-brainer upgrade; if you do serious Chinese NLP / knowledge work, it can complement DeepSeek V4 / Kimi K2.7 Code / GLM-5.2; if you focus on overseas or English-language tasks, GPT-5.6 / Claude series remain the primary choice.
Version History
- Upgraded to Seed-2.1-Pro-0915 with stronger multimodal coding (2026-09-16): Doubao upgraded to Doubao-Seed-2.1-Pro-0915, targeting production-grade enterprise needs with stronger multimodal coding and understanding. Sketches, screen recordings and design files convert directly into runnable code, and four design images are enough to rebuild an interactive 3D scene in stages. On a 387,000-line open-source game repository, 83% of historical development tasks produced mergeable engineering deliverables; on a 280,000-line legacy Java ERP system it produced three mobile pages totalling about 2,000 lines in roughly two hours and ran the full purchase-to-inventory flow. The API is fully live on Volcano Ark, Doubao Work has adopted it, and Doubao-Seed-Evolving was updated to the same version.
- Doubao 2.1 Pro / Turbo / Seed-Evolving (2026-06-23): Coding on par with Opus 4.7, 10+ hour autonomous engineering, watch 2-hour video editing; cost reduced by 80%; simultaneously released Seedance 2.5 + Seedream 5.0 + Doubao Audio 1.0
- Doubao 2.0 (2026-02-14): Comprehensive upgrade of multimodal AI capabilities, reshaping a new paradigm for industrial intelligence
- Latest updates on the official site show the Doubao large model 1.6 upgrade (the first in China to natively support tiered thinking-length control), a major Doubao voice model upgrade, and the launch of intelligent features on the Ark model service platform (2025-10-16): The latest updates on the official website show that Doubao Large Model 1.6 has been upgraded (the first in China to natively support tiered adjustment of thinking length), Doubao voice model has undergone a major upgrade, and the Ark model service platform has released intelligent model routing features. These updates all came after the date of the 2.1 Pro version mentioned in the evaluation, and are new developments not covered by the evaluation.
- Doubao 1.x (2024-2025): Evolution from a single-point assistant to a multimodal platform