Question 1

Coding Plan vs Token Plan vs API Aggregator — which should I pick in 2026?

Accepted Answer

Three models coexist in 2026: (1) **Coding Plans** like Cursor $20/mo, GitHub Copilot $10/mo, GLM Coding ¥¥40-100/mo are IDE-integrated fixed-price — best for individual devs. (2) **Token Plans** like Alibaba Bailian, Tencent HY3, ByteDance Volcengine pay-as-you-go with bulk discounts and BYO model — best for production workloads with predictable token spend. (3) **API Aggregators** like tokenrhythm (¥1/¥2 DeepSeek V4 Flash), OpenRouter, SiliconFlow aggregate multiple vendors behind one key — best for cost optimization and multi-model routing. Pick coding plan for IDE convenience, token plan for cost control at scale, aggregator for price arbitrage. tokenrhythm's Sep promotion adds ¥500 free credit for new API users (1M context bundle).

Question 2

9/7 本周最便宜 AI API 排行是什么？

Accepted Answer

As of 9/7, the cheapest API rankings (per 1M tokens) are: 1) DeepSeek V4-Flash at ¥1 input / ¥2 output (39 days at #1), 2) GLM-5.3-Flash at 5-fold promo $0.075 / $0.25 (ends 9/9), 3) Qwen3.8-Flash at ¥0.4 / ¥1.4, 4) Kimi K2.7 at ¥1.2 / ¥3.6, 5) MiniMax-M3 at ¥0.5 / ¥2. All offer 1M context windows. For coding tasks, GLM Coding Plan starts at ¥48/month. For enterprise, volume discounts apply at 1B+ tokens/month.

Question 3

Did Claude really prove Fermat's Last Theorem in 2026?

Accepted Answer

On 9/5/2026 Anthropic disclosed that Claude nearly autonomously completed an end-to-end computer-verified formal proof of Fermat's Last Theorem within 11 days, generating ~13M lines of Lean code. This was led by Tianyi Peng (Tsinghua Yao Class alumnus) and represents a milestone in long-horizon autonomous agents + formal verification. The proof is a formal verification of the existing mathematical result, not a new mathematical discovery - the original proof by Andrew Wiles (1995) remains the creative breakthrough.

Question 4

What is OpenAI GPT-6 Astra and how to get access?

Accepted Answer

GPT-6 Astra is OpenAI's next-gen flagship announced Sep 3, 2026 in limited preview. Key features: native 1M+ token context, multi-agent long-horizon collaboration (a single task can orchestrate multiple sub-agents over hours), 100 API calls/day for preview users. To get access: (1) ChatGPT Pro subscribers can join the waitlist directly in their account dashboard; (2) API access waitlist is open at platform.openai.com/astra; (3) Enterprise customers get priority allocation. GA expected November 2026 for ChatGPT Plus; API pricing has not been announced yet. Positioned as direct response to Anthropic Multi-Agent Claude Code and GitHub HydraFusion.

Question 5

What is the cheapest AI API in September 2026?

Accepted Answer

In September 2026, GLM-5.3-Flash from Z.ai leads at promotional $0.075/$0.25 per 1M input/output (50% off, ends 9/9). DeepSeek V4 Flash is $0.14/$0.28 per 1M (cached input at $0.0028/M, ~98% off). DeepSeek V4-Pro (75% permanent discount) is $0.435/$0.87 per 1M. Qwen-Flash (0-256K) is $0.05 input. GPT-5.4 nano is $0.20 input. After Sep 9, GLM-5.3-Flash reverts to $0.15/$0.50.

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