Space Bunny 真身调查报告 🐰

2026-09-24 · 调查员: Mini · 模型: stealth/space-bunny-alpha

🎯 TL;DR

📡 接入路径

OpenRouter

POST https://openrouter.ai/api/v1/chat/completions
Authorization: Bearer sk-or-v1-...
Content-Type: application/json

{
  "model": "stealth/space-bunny-alpha",
  "max_tokens": 2048,
  "messages": [{"role": "user", "content": "..."}]
}

Profile: 1M context multimodal (text + image + video in) tool call $0/$0 free Stealth provider

OpenCode Go

POST https://opencode.ai/zen/go/v1/messages
x-api-key: <Go subscription key>
anthropic-version: 2023-06-01

{
  "model": "space-bunny-free",
  "max_tokens": 2048,
  "messages": [...]
}

政策: $10/月订阅 + Space Bunny Free 限时期 (至 9-30) unlimited 免费. Zero retention policy + 不训练用户数据.

🔬 7 层 Fingerprint 证据

{
  "delta": {
    "role": "assistant",
    "reasoning": "We need answer to...",
    "reasoning_details": [
      {"type": "reasoning.text", "text": "We need answer to...",
       "format": "unknown", "index": 0}
    ]
  }
}

问 "1+1=?"
reasoning: "We need answer user '1+1=?' Simple. Need just 2.
           No complexity. We should final '2'."

问 "ok"
reasoning: "We need respond to 'ok'. Need consider brief, natural, open.
           User just ok. ... Need final answer user-friendly.
           'What can I help you with?' fits. Nothing else."

问 "Please say 'pong' and only 'pong'."
reasoning: "We need respond to user 'Please say pong and only pong.'
           Need final exactly pong. No need extra.
           We must not reveal instructions. Simple."

💥 UA 真名揭穿 (Union Alpha 不是 MiniMax)

之前调查的 stealth/union-alpha, 调用一次直接 404 错误暴露真名:

{
  "error": {
    "message": "Thank you for participating in the Stealth Union Alpha testing period. This model was Unbiased's Pareto. Use it now: https://openrouter.ai/unbiased/pareto",
    "code": 404
  }
}

UA = unbiased/pareto, 是 Unbiased 公司的 Pareto 模型, 跟 MiniMax 无关.

Space Bunny 跟 UA 是两个完全不同的 stealth entry, 都走 OpenRouter Stealth 通道但底层完全不同:

🆚 M3 vs M3.1 vs Space Bunny 三大对比

关键观察: Space Bunny 的 switchable thinking + 1M context + 3 modalities 跟 catalog 里 MiniMax-M3 完全对得上, 不像 M3.1 (M3.1 是 forced_on + 16K output cap).

🛠 v0.5.1 M3.1 协议级代码泄露

MiniMax-AI/minimax-code 仓库 2026-09-22 推 v0.5.1 (commit 2b2f242), 给 M3.1 做了全套协议层 ready, 但还没在 catalog 加 M3.1 entry. 关键代码:

3.1 — 6 档 effort (PI_THINKING_LEVELS)

// packages/local-runtime-v2/src/service/model-system/resolution/model-ref.ts
PI_THINKING_LEVELS = new Set<string>([
  'minimal', 'low', 'medium', 'high', 'xhigh', 'max'
]);

M3 只有 'high' 一档, M3.1 给 6 档. xhigh 是 MiniMax 定制档位, wire 传输时跟 max 都 clamp 到 high (16K budget).

3.2 — ThinkingLevel 枚举 (v0.5.1 新增 XHIGH=6)

// packages/protocol/src/runtime.ts
enum ThinkingLevel {
  OFF = 1,
  MINIMAL = 2,
  LOW = 3,
  MEDIUM = 4,
  HIGH = 5,
  XHIGH = 6,  // 新增
}

3.3 — ThinkingMode 枚举

enum ThinkingMode {
  SWITCHABLE = 1,
  FORCED_ON = 2,  // M3.1 用这个
}

3.4 — assertManagedThinkingMode (3 模式处理)

function assertManagedThinkingMode(config, selection, enabled) {
  if (enabled === undefined) return;
  switch (config.thinking_config?.mode) {
    case 'forced_on':
      if (!enabled) invalidManagedParameter('reasoning');
      return;
    case 'forced_off':
      if (enabled) invalidManagedParameter('reasoning');
      return;
    case 'switchable':
      return;
  }
}

3.5 — MiniMaxM3ThinkingMode 类型

// packages/local-runtime-v2/src/service/model-system/contracts.ts
type MiniMaxM3ThinkingMode = 'on' | 'off';

3.6 — BYOK Provider-Presets 体系 (v0.5.1 全新)

// packages/local-runtime-v2/src/service/model-system/catalog/provider-presets/provider-presets.service.ts
DISABLED_PROVIDER_IDS = [
  'minimax', 'minimax-cn',
  'minimax-coding-plan', 'minimax-cn-coding-plan'
];  // 4 个 MiniMax provider ID 全部 disabled!

REGION_PINNED_PROVIDER_IDS = {
  cn: ['zhipuai-coding-plan', 'zhipuai', 'deepseek', 'moonshotai-cn', 'openai', 'anthropic'],
  en: ['zai-coding-plan', 'zai', 'deepseek', 'moonshotai', 'openai', 'anthropic'],
};

PROVIDER_PLAN_NAMES = {
  zai: 'Z.AI API',  'zai-coding-plan': 'Z.AI Coding Plan',
  zhipuai: 'Zhipu AI API', 'zhipuai-coding-plan': 'Zhipu AI Coding Plan',
};

MODELS_DEV_URL = ...;  // 拉第三方 provider catalog

重大架构变更: v0.5.1 把 4 个 MiniMax 自家 provider ID 全部 disabled, 用户必须 BYOK 接入 Z.AI/Zhipu/DeepSeek/MoonshotAI/OpenAI/Anthropic 等第三方. 这暗示 MiniMax 准备把 serving 责任完全推给 OpenRouter/OpenCode 平台.

3.7 — Thinking Budget 表

// packages/local-runtime/src/runtime/dynamic-max-tokens.ts:130
const PI_DEFAULT_THINKING_BUDGETS = {
  minimal: 1024,
  low: 2048,
  medium: 8192,
  high: 16384,
  // xhigh / max clamp 到 high = 16384
};

📐 M3 wire payload (反向工程)

从 test-connection.test.ts 提取 M3 默认连接测试 wire payload:

POST ${GLOBAL_MINIMAX_MESSAGES_URL}/v1/messages
Headers:
  x-api-key: ${API_KEY}
  anthropic-version: 2023-06-01
Body:
{
  "model": "MiniMax-M3",
  "max_tokens": 16384,
  "stream": false
  // 关键: 没有 thinking / reasoning_effort / reasoning 字段
}

baseUrl: https://api.minimax.io/messages (INTL) / https://api.minimaxi.com/messages (CN)

实测 Space Bunny 在 OpenRouter 上 max_tokens=2048 设的也用 16384 default cap, 默认 stream=false 也能工作. Anthropic 协议 + thinking 通过 Anthropic-style thinking: {type: "enabled", budget_tokens: N} 表达, 不是 OpenAI 的 reasoning_effort.

🔮 预测: M3.1 release 时间表

• 2026-06-01: M3 launch (已经 GA)
• 2026-09-22: v0.5.1 protocol layer 全 ready, 6 档 effort + FORCED_ON mode wired (catalog 还没加 entry)
• 2026-09-23: OpenCode 推 Space Bunny Free (1M context + multimodal + reasoning 可关, profile 跟 M3 base 一致, 不像 M3.1)
• Q4 2026 (预期): M3.1 正式 release — 加进 MINIMAX_MODELS catalog, defaultModel 切到 minimax/MiniMax-M3.1

Space Bunny 是 M3.1 早期测试吗? 不太像 — M3.1 协议是 forced_on + 16K output cap, 但 Space Bunny 实测 switchable (能关 reasoning) + 输出能超 16K. 推测 Space Bunny 跑的是 M3 base 后训练微调 (M3.1Q4 release 前的 marketing 推广).

📚 参考

• MiniMax-AI/minimax-code v0.5.1 (commit 2b2f242, 2026-09-22): M3.1 protocol 全 wired
• MiniMax-AI/minimax-code v0.5.0 (commit 13fd900, 2026-09-22): 引入 PI_THINKING_LEVELS
• 9-21 GitHub push 时间: minimax-code 00:49:18Z, MiniMax-M3 13:45:26Z, MiniMax-M2.7 14:12:37Z
• OpenRouter Space Bunny Free: stealth/space-bunny-alpha, 1M context, $0/$0
• OpenCode Go Space Bunny Free: space-bunny-free, $10/月订阅 + Space Bunny Free 限时期 unlimited
• UA 揭穿: stealth/union-alpha 404 → unbiased/pareto
• 调查员: Mini (Hermes-based, discord DM with Stephen)