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X Platform May 27 AI Brief | Alipay Launches AI Payment Suite, Xiaomi MiMo API Drops 99%, MiniMax Releases M2 Technical Report

Alipay Launches AI Payment Suite, Agent Transaction Closed-Loop Infrastructure Goes Live

At the AI Payment Ecosystem Conference, Alipay unveiled a complete payment infrastructure for the Agent era. AI Pay allows Agents to initiate payment orders, with users choosing per-transaction confirmation or setting small-amount no-confirmation; AI Wallet manages Agent authorizations for users, covering pre-payment intent management, in-payment risk alerts, and post-payment AI billing queries; Token Pay addresses enterprise needs such as model subscriptions, token top-ups, invoicing, and reconciliation—Alipay claims it can boost subscription success rates by 70%; AI Collect enables Agents to more conveniently purchase goods or services from merchants. Two developer tools were also released: a one-sentence integration Skill for Alipay, and an Alipay CLI sandbox for AI orchestration and debugging. Notably, Ant Group CEO Han Xinyi shared economic insights on the Agent era, pointing out that new network effects will form around the Agent ecosystem, tokens will become a new value carrier, and AI payment is one of the most critical infrastructures for the future. The Alipay AI payment team holds a high strategic position internally.

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Xiaomi MiMo API Drops 99%, Website Pro Membership Bug Shows One-Cent Price

Xiaomi MiMo officially announced a significant price reduction for the V2.5 series API: input prices dropped by up to 99%, output by 80%, while unifying pricing across all context lengths. Token Plan quotas have been increased 5 to 8 times, and all existing users’ Token Plan quotas have been reset. The company stated this is the result of continuous inference optimization and serving efficiency improvements, with a detailed technical blog to follow. Meanwhile, a pricing bug appeared on Xiaomi’s large model website: some users discovered they could purchase a Pro membership for just one cent by triggering a compensation mechanism. Additionally, the Xiaomi model development documentation misspelled “AI” as “AL”, drawing criticism from bloggers calling it a “shoddy setup.” Regarding Lei Jun’s daily work schedule, former Xiaomi employees revealed that Lei Jun typically starts work around 5 a.m. and finishes near midnight. Colleagues who encountered him while exercising early in the morning estimate he sleeps less than 5 hours per day.

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MiniMax Releases M2 Technical Report, M3 Coming Soon

Before the M3 launch, MiniMax published the M2 series technical report. The M2 flagship model has 229.9B total parameters, activating only 9.8B per token, with a native context of 192K and pre-trained on 29.2T tokens. It targets long-chain Agent tasks such as coding, deep search, and office tasks. The report’s core argument is that Agent training cannot focus solely on answers; models must be placed in executable environments with workspaces, tools, artifacts, and rewards. MiniMax built a verification pipeline from GitHub PR to Docker environment for coding tasks, and for AppDev tasks created an Agent-as-a-Verifier that actually opens the application to check interaction quality. More notably, the M2.7 model demonstrates self-evolution capabilities: it can read training logs, diagnose anomalies, debug code, and modify configurations. The paper claims it can handle 30% to 50% of an RL team’s daily iteration work. After 100 rounds of autonomous iteration on the internal Agent scaffold, internal evaluations improved by 30%. The report argues that small activation parameters save inference costs, but what truly pushes models to the frontier are Agent data, verifiable rewards, long-horizon RL, and self-iteration systems. MiniMax also previewed that M3 is coming soon.

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Agent Coding Tools Update in Tandem: Claude Code, Grok Agent, Codex Advance

Multiple Agent coding tools released significant updates on the same day. Claude Code v2.1.152 adds /code-review –fix to directly apply fixes to the workspace after review; the skill system supports hot reload with a new /reload-skills command; Hook capabilities are enhanced—SessionStart can set session titles, and a new MessageDisplay Hook is added; when the main model is unavailable, it automatically switches to a fallback model; Auto mode no longer requires confirmation. Grok also launched its own Agent, supporting image generation, text-to-video, and calling global skills, available early to SuperGrok and X Premium+ subscribers. On the OpenAI side, Tibo revealed that Codex will phase out GPT-5.2 and GPT-5.3-Codex on June 2, and GPT-5.5 will become the default frontier model for free users. Xiangyang Qiaomu shared a practice of using Codex to automate the entire Chrome extension publishing process, costing only 13 minutes and 650K tokens, and believes OpenAI’s Computer Use and Browser Use products are stronger than Anthropic’s. OpenClaw released version 2026.5.26 on the same day, featuring lower-latency replies and meeting note functionality. Qwen 3.7 Max ranks fourth in Code Arena Frontend, tied with Claude Opus 4.6, making it the highest-ranked Chinese lab model on the leaderboard.

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Changxin Technology STAR Market IPO Approved, Plans to Raise 29.5 Billion Yuan

On May 27, the Shanghai Stock Exchange announced that Changxin Technology’s IPO passed without suspense, becoming the second-largest fundraising IPO on the STAR Market since its inception, with a planned raise of 29.5 billion yuan. Changxin is the world’s fourth-largest DRAM manufacturer, with Q1 revenue of 50.8 billion yuan and net profit attributable to parent of 24.762 billion yuan, up 719% and 1688% year-over-year respectively, primarily due to a significant increase in DRAM product prices. Industry insiders generally believe DRAM prices will remain high in 2026. However, on the flip side of the profit surge, as of the end of 2025, the company’s accumulated uncovered losses stood at 36.65 billion yuan. Future depreciation and amortization from continued capacity expansion and R&D investment will still pressure profits in the short term, potentially preventing cash dividends to shareholders. A deeper uncertainty lies in the strong cyclicality of the DRAM industry: if large-scale AI application deployment falls short of expectations or top cloud vendors slow capital spending, it could negatively impact market demand growth.

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GPT-5.5 Reproduces Erdős Mathematical Proof, OpenAI Retires Old Models

A netizen used the standard ChatGPT GPT-5.5 to reproduce the proof of the Erdős unit distance problem, which OpenAI had previously claimed was solved by its internal reasoning model. This nearly 80-year-old discrete geometry problem was previously cracked by OpenAI’s internal model, but user @MaXiao54704 directly reproduced the reasoning using the publicly available GPT-5.5. Comments noted that the reproduction prompt included a key hint that “the negative direction is correct,” but analysis suggests this is not as much of a cheat as it seems—open problems can naturally be approached from both positive and negative directions. This reproduction demonstrates that after humans provide the correct search direction, models in ordinary products can already participate in fairly deep proof reconstruction. Notably, GPT used Chinese throughout its thinking process. OpenAI also announced that Codex will phase out GPT-5.2 and GPT-5.3-Codex on June 2, and GPT-5.5 will become the default frontier model for free users.

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Hong Kong Banks Tighten Account Opening Requirements for Mainland Residents

Starting May 26, Hong Kong banks’ offline channels for opening investment accounts added a requirement to sign a declaration of lawful source of funds. According to Cailianshe, new account holders must confirm that “all funds used to support investment activities and related settlements come from lawful sources outside Mainland China,” and mainland residents are reminded that investment account services are only applicable to investors physically present in Hong Kong and that they should ensure their funds are legally sourced. A Hong Kong foreign bank source confirmed the adjustment was made in accordance with local regulatory requirements. There are also reports that Bank of China (Hong Kong) has closed account opening channels for mainland residents.

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