AI Coding Live News

Axion 1.0 Open Agent Foundation Model: Two SFT Stages Plus RL, 35B-A3B Reproduction Checkpoint Under Apache 2.0, Full Recipe Released

arXiv paper 2611.03233 by Yuqi Jia, Yunjie Tian and five co-authors introduces Axion 1.0, an agent foundation model that is open beyond its weights. It uses just two lightweight SFT stages plus reinforcement learning, with no dedicated mid-training, DPO or on-policy distillation, and about 18K SFT trajectories in total. Training code is hosted under the bytedance GitHub organization, and the training data and an Axion 1.0-35B reproduction checkpoint (Qwen3.6-35B-A3B base, 35B total / 3B active, Apache 2.0) are on Hugging Face; weights for the paper's 122B model are listed as coming soon.

Axion 1.0 Open Agent Foundation Model: Two SFT Stages Plus RL, 35B-A3B Reproduction Checkpoint Under Apache 2.0, Full Recipe Released

Key Takeaways

  • A minimal recipe: SFT stage one for self-contained scientific reasoning, stage two for tool use and information seeking, then RL for long-horizon interaction, with 18,363 SFT trajectories and 484 RL tasks
  • The release covers data construction, generation, filtering, verification, prompts and training code (GitHub), not just weights
  • The 35B reproduction checkpoint scores 52.8 on HLE, 60.4 on SEAL-0, 85.0 on FrontierScience Olympiad and 55.0 on FrontierScience Research (HF model card)
  • The paper's 122B model reports 59.0 on HLE with restricted website access and 66.7 on FrontierScience Research; 122B weights are not out yet
  • All scores are self-reported; the HF card lists Claude Opus 5 at 63.6 on HLE, so Axion still trails the strongest closed models
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Linked Models & Agents:
⚡ Axion 1.0-35B⚡ Axion 1.0-122B⚡ Qwen3.6-35B-A3B🌐 ByteDance🌐 Hugging Face

CapCut announces a ChatGPT plugin is coming soon, bringing its video generation and editing tools inside ChatGPT with drafts that move to the CapCut web editor

At 18:34 UTC on 2026-10-24, during its CapCut World event in Los Angeles, ByteDance's CapCut announced from its official account (@capcutapp) that a new CapCut plugin is coming soon to ChatGPT (post). According to CapCut, the plugin brings its video editing and generation tools inside ChatGPT: users can start with an idea in ChatGPT, create it with the plugin right in the chat, then move the draft to the CapCut web editor to refine and publish. When we pulled it, the post had about 3,646 likes, 319 reposts, 504 replies and 450K views. The event site lists OpenAI's Head of Partnerships Mahak Sharma and Head of Creator Product Sam Yam as speakers. Many creator posts on X say the plugin is already in early access on ChatGPT desktop with mobile and web around mid-November, but CapCut's own post still says coming soon, so timing and pricing should be taken from CapCut's later announcements.

Key Takeaways

  • Official source: CapCut's post on X, published 18:34 UTC on 10-24, with about 3,646 likes, 319 reposts, 216 quotes, 504 replies and 450K views when we pulled it
  • What it does: CapCut's video editing and generation tools inside ChatGPT, so a chat idea can become a video draft directly
  • Workflow: drafts made with the plugin can move to the CapCut web editor for further editing, sharing and publishing
  • OpenAI involvement: the CapCut World Los Angeles site lists OpenAI's Mahak Sharma (Head of Partnerships) and Sam Yam (Head of Creator Product) as speakers
  • Status: CapCut says coming soon; creator claims of desktop early access now and mobile and web in mid-November are not confirmed by CapCut, and pricing is not announced
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ByteDance's BytePlus launches Seedance 2.5 4K: a native 4K, 10-bit video generation model with a low-cost 480p Draft preview mode

On 2026-10-23 (15:31 UTC), ByteDance's enterprise cloud BytePlus (@BytePlusGlobal) launched Seedance 2.5 4K, calling it the most capable model in the Seedance 2.5 generation. It brings more nuanced facial expressions and movement, fuller textures, contours and fine detail, and 10-bit colour depth for smoother gradations that suit the big screen. A new Draft mode lets creators test storyboards and refine shots with lower-cost 480p previews, then render the final version in 4K. It is currently available only to selected enterprise customers, and BytePlus says API availability updates are coming. It debuted in the short film "Otter is Nobody 2".

ByteDance's BytePlus launches Seedance 2.5 4K: a native 4K, 10-bit video generation model with a low-cost 480p Draft preview mode

Key Takeaways

  • The most capable model in the Seedance 2.5 generation, with native 4K output (official announcement)
  • More nuanced facial expressions and movement, with fuller textures, contours and fine detail
  • 10-bit colour depth for richer gradations and smoother transitions
  • Draft mode: refine storyboards with low-cost 480p previews, then render the final cut in 4K
  • Selected enterprise customers only for now; no public API, pricing or benchmarks yet
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Linked Models & Agents:
⚡ Seedance 2.5 4K🌐 ByteDance🌐 BytePlus

FreeMatching: HKUST and ByteDance Open-Source Dense Correspondence Matching Beyond Spatio-Temporal Priors

Dense correspondence matching serves as the bedrock for optical flow, 3D stereo reconstruction, and object tracking. For decades, classical matching algorithms have fundamentally relied on rigid spatio-temporal priors: smooth motion continuity and rigid geometry. However, these foundational assumptions collapse under modern AI image editing and reference-guided generation (IEG), where visual identity is preserved while physical and geometric continuity is drastically severed (such as radical pose warps, stylistic shifts, or compositional recontextualization). Researchers from HKUST and ByteDance introduce FreeMatching (arXiv:2610.12421, code: github.com/luping-liu/FreeMatching), a generalizable framework for dense correspondence matching beyond spatio-temporal priors. FreeMatching fuses generative foundation features (from diffusion backbones) with high-level semantic representations (from vision foundation models), trained against heterogeneous supervision spanning classical benchmarks, tracked video sequences, and synthetic 3D scenes. An unsupervised teacher-guided iterative refinement loop further sharpens dense correspondences across challenging generated image pairs without requiring dense manual annotations. FreeMatching achieves dramatic leaps in correspondence precision across complex AI-edited image pairs while retaining competitive accuracy on classical optical flow tasks, and serves as an auditable quantitative metric for evaluating visual identity preservation that closely aligns with human judgment.

Key Takeaways

  • HKUST and ByteDance open-source FreeMatching, breaking free from traditional spatio-temporal priors in dense correspondence
  • Cuts end-point error by 42.6% and raises PCK by 31.8 percentage points across aggressive AI image edits and non-rigid transformations
  • Establishes a quantitative identity preservation metric highly correlated with human judgment (r = 0.88), fully available on GitHub
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MC-Sparse: CUHK and ByteDance Unveil Meta-Cached Sparse Attention for DiTs, Accelerating Video & 3D Generation by 2.32x with Zero Quality Loss

Diffusion Transformers (DiTs) underpin frontier video generation systems and high-fidelity 3D modeling, yet self-attention computation over extreme sequence lengths introduces prohibitive inference latencies and memory bottlenecks. While sparse attention represents a promising acceleration pathway, existing methods suffer substantial visual quality degradation and texture corruption under high sparsity regimes. Researchers from The Chinese University of Hong Kong (CUHK) and ByteDance analyze sparse attention failures in DiTs (arXiv:2610.06801), tracing quality drops to three root causes: rigid token grouping constraints, inaccurate interaction selection, and uncompensated attention residuals from discarded tokens. The authors introduce Meta-Cached Sparse Attention (MC-Sparse, project site: dodododddo.github.io/mcsparse-project-page/), a training-free framework that preserves individual Key-Value (KV) selection precision while organizing similar Queries into tile-aligned blocks for hardware efficiency on GPUs. MC-Sparse caches query clusters, exact KV indices, and dense-sparse attention output residuals, reusing this metadata across downstream denoising timesteps. On Minimax-H3-Base video models, MC-Sparse delivers a 1.80x denoising speedup, and a 2.32x acceleration on 3D generative backbones, maintaining near-identical fidelity to dense attention with zero visible quality degradation.

Key Takeaways

  • CUHK and ByteDance introduce MC-Sparse, leveraging meta-caching to eliminate quality degradation in sparse DiTs
  • Delivers a 1.80x speedup on Minimax-H3-Base and 2.32x on 3D generation while cutting peak memory by 45%
  • Operates training-free with residual compensation, matching dense attention quality across visual benchmarks
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Linked Models & Agents:
⚡ MC-Sparse⚡ DiT⚡ Minimax-H3-Base⚡ Triton-Sparse🤖 Inference-Optimizer🤖 DiT-Accelerator🌐 CUHK🌐 ByteDance🌐 Hugging Face

GAGAR: Groupwise Agentic Grading and Advantage Redistribution Stabilizes Code Agent RL on 1.02T Models

Reinforcement learning for code agents typically relies on executable tests for binary rewards, leading algorithms like GRPO to assign identical scalar advantages to all passing rollouts regardless of code bloat, extraneous modifications, or architectural hygiene. Researchers from ByteDance, Peking University, and Tsinghua introduced GAGAR, a quality-aware advantage redistribution framework. By staging rollouts in a shared workspace where an SFT agentic grader ranks passing candidates and dynamically shifts credit toward clean solutions, GAGAR successfully stabilizes code agent RL on 310B Flash and 1.02T Pro models.

GAGAR: Groupwise Agentic Grading and Advantage Redistribution Stabilizes Code Agent RL on 1.02T Models

Key Takeaways

  • Overcoming Binary Verification Blind Spots: Conventional code agent RL treats all test-passing rollouts equally, causing policy optimization to reward bloated, fragile, or out-of-scope code as long as test assertions pass.
  • Sum-Preserving Credit Redistribution: Stages rollout groups in a shared context where an SFT-trained agentic judge ranks solutions, downweighting sloppy passes while proportionally shifting advantages to clean, minimal-diff implementations without altering total group advantage magnitude.
  • Industrial Validation on 1.02T Model: Evaluated at scale on MiMo-V2.6-Flash (310B) and MiMo-V2.6-Pro (1.02T), GAGAR curbs trajectory-length explosion, enhances training stability, and substantially elevates code cleanliness.
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DeerFlow 2.1.0: 772-PR milestone — verifiable subagent delegation, pluggable memory, five remote sandboxes

ByteDance’s DeerFlow shipped v2.1.0 on 2026-09-24, closing the milestone with 772 merged PRs (~83k GitHub stars). Focus: trust and ops—verifiable subagent delegation, optional durable batch_task, pluggable memory (DeerMem / OpenViking / mem0 HTTP), plus E2B, BoxLite micro-VM, Tenki and OpenSandbox providers. Breakings: unconditional X-Trace-Id, reserved /mnt/skills, memory config under memory.backend_config, Docker bind defaults to 127.0.0.1.

DeerFlow 2.1.0: 772-PR milestone — verifiable subagent delegation, pluggable memory, five remote sandboxes

Key Takeaways

  • Shipped: v2.1.0 — 772 PRs; site deerflow.tech
  • Verifiable subagent delegation + tamper-evident tool stamps; optional durable batch_task
  • Pluggable memory.manager_class; FTS5/BM25; OpenViking & mem0 HTTP backends
  • Sandbox: E2B replicas cap; BoxLite / Tenki / OpenSandbox among new providers
  • Breakings: always-on X-Trace-Id, PAT auth, loopback Docker bind — read CHANGELOG before upgrade
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ByteDance Releases DeerFlow 2.0: Ground-Up Rewrite of 83K-Star Long-Horizon SuperAgent Harness

ByteDance launched DeerFlow 2.0.0, completing a ground-up rewrite of its 83k-star open-source agent harness with 182 merged PRs. Built around a SuperAgent architecture, DeerFlow 2.0 orchestrates sub-agents, persistent memory, and sandboxed execution with extensible tools. It introduces self-updating SOUL memory, user-owned IM channel integrations (Feishu, DingTalk, WeChat, Slack, Discord, Telegram), Docker DooD sandbox protection, and deep integration with BytePlus InfoQuest crawling technology for robust multi-hour autonomous execution.

ByteDance Releases DeerFlow 2.0: Ground-Up Rewrite of 83K-Star Long-Horizon SuperAgent Harness

Key Takeaways

  • Full architectural rewrite: migrated from rigid workflows to a SuperAgent harness orchestrating sub-agents, memory, and sandboxes
  • Evolving agent souls: agents can modify and persist their own SOUL.md and YAML configs across chats with strict user isolation
  • Universal IM gateway: native support for Feishu/Lark, DingTalk, WeChat/WeCom, Slack, Discord, and Telegram integrations
  • Enterprise-grade sandbox: DooD Docker isolation with automated zip-bomb protection and sensitive MCP credential masking
  • Production observability: Langfuse distributed tracing with parent-child attribution and thread-indexed O(1) query acceleration
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ByteDance Develops Real-Time Spatial Video Model & Secures .6B AI Credit Facility

ByteDance is developing a real-time spatial video generation foundation model tailored for embodied robotics, physical world simulation, and next-gen Pico XR headsets. Concurrently, ByteDance secured a landmark .6 billion AI credit facility to finance hyperscale GPU clusters.

Key Takeaways

  • Builds real-time spatial video generation foundation models for 3D physics and robotics
  • Secures .6B global syndicated loan facility to finance long-term AI compute expansion
  • Directly integrates with Pico spatial headsets, autonomous driving, and embodied robotics
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Linked Models & Agents:
⚡ Doubao Video⚡ Spatial World Model🌐 ByteDance

ByteDance Trae AI ships cross-language architecture refactoring mode for porting Python/Node to Go/Rust

ByteDance's Trae AI IDE launched a specialized cross-language refactoring workflow. Designed for legacy modernization, it parses Python and Node.js schemas, business logic, and API endpoints, generating idiomatic Go and Rust equivalents along with automated parity test suites.

Key Takeaways

  • Translates legacy Python and Node.js logic into high-performance, idiomatic Go and Rust codebases.
  • Generates automatic behavioral parity test suites to ensure 100% functional equivalence.
  • Optimized for high-speed local developer environments with bilingual documentation.
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ByteDance TRAE SOLO rebrands to TRAE Work: Expanding from coding agent to general work agent

ByteDance's TRAE announced that SOLO is officially rebranded to TRAE Work, expanding its mission from a coder-only tool into a general work agent. The release unifies Builder and Coder into a single agent while establishing Hooks, Model Context Protocol (MCP), and Skills as standard extension layers.

Key Takeaways

  • Rebrands from SOLO to TRAE Work, broadening capabilities from pure coding to end-to-end delivery.
  • Unifies Builder and Coder into a single agent, reducing mode-switching complexity.
  • Establishes MCP, custom Skills, and lifecycle Hooks as standard IDE extension layers.
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