arena: recent AI signals

The latest LMSYS Arena leaderboard movements we picked up from arena. Updated as new data arrives; the free daily digest sends one signal per core source.

• Sep 12, 2026 arena
  claude-fable-5
  claude-fable-5
• Sep 12, 2026 arena
  claude-opus-4-6-high
  claude-opus-4-6-high
• Sep 12, 2026 arena
  claude-opus-4-7-high
  claude-opus-4-7-high
• Sep 12, 2026 arena
  claude-fable-5.1-max
  claude-fable-5.1-max
• Sep 12, 2026 arena
  muse-spark-1.2 (xHigh)
  muse-spark-1.2 (xHigh)
• Sep 12, 2026 arena
  claude-opus-4-6
  claude-opus-4-6
• Sep 12, 2026 arena
  claude-opus-4-7
  claude-opus-4-7
• Sep 12, 2026 arena
  muse-spark-1.1
  muse-spark-1.1
• Sep 12, 2026 arena
  claude-opus-5-high
  claude-opus-5-high
• Sep 12, 2026 arena
  gemini-3.8-flash-high
  gemini-3.8-flash-high
• Sep 12, 2026 arena
  gemini-3.7-flash-high
  gemini-3.7-flash-high
• Sep 12, 2026 arena
  muse-spark
  muse-spark
• Sep 12, 2026 arena
  gemini-3.1-pro-preview
  gemini-3.1-pro-preview
• Sep 12, 2026 arena
  claude-opus-5-max
  claude-opus-5-max
• Sep 12, 2026 arena
  glm-5.3-max
  glm-5.3-max
• Sep 12, 2026 arena
  gemini-3-pro
  gemini-3-pro
• Sep 12, 2026 arena
  kimi-k3-max
  kimi-k3-max
• Sep 12, 2026 arena
  claude-opus-4-8-high
  claude-opus-4-8-high
• Sep 12, 2026 arena
  gpt-5.6-sol-xhigh
  gpt-5.6-sol-xhigh
• Sep 12, 2026 arena
  gpt-5.5-high
  gpt-5.5-high
• Sep 12, 2026 arena
  gpt-6-astra-max
  gpt-6-astra-max
• Sep 12, 2026 arena
  qwen3.8-max-0902
  qwen3.8-max-0902
• Sep 12, 2026 arena
  qwen3.8-max
  qwen3.8-max
• Sep 12, 2026 arena
  muse-spark-1.3-max
  muse-spark-1.3-max
• Sep 12, 2026 arena
  qwen3.8-flash-next
  qwen3.8-flash-next
• Sep 12, 2026 arena
  hy4-preview
  hy4-preview
• Sep 12, 2026 arena
  muse-spark-1.3 (xHigh)
  muse-spark-1.3 (xHigh)
• Sep 12, 2026 arena
  grok-4.6-high
  grok-4.6-high
• Sep 12, 2026 arena
  gpt-5.6-sol-xhigh (codex-harness)
  gpt-5.6-sol-xhigh (codex-harness)
• Sep 12, 2026 arena
  deepseek-v4.1-flash-max
  deepseek-v4.1-flash-max
• Sep 12, 2026 arena
  glm-5.3-flash
  glm-5.3-flash
• Sep 12, 2026 arena
  qwen3.8-27b
  qwen3.8-27b
• Sep 12, 2026 arena
  glm-5.2-max
  glm-5.2-max
• Sep 12, 2026 arena
  gpt-5.5
  gpt-5.5
• Sep 12, 2026 arena
  gemini-3.6-flash-high
  gemini-3.6-flash-high
• Sep 12, 2026 arena
  gemini-3.5-flash-high
  gemini-3.5-flash-high
• Sep 12, 2026 arena
  gemini-3.5-flash-medium
  gemini-3.5-flash-medium
• Sep 12, 2026 arena
  grok-4.5
  grok-4.5
• Sep 12, 2026 arena
  gpt-5.4-high
  gpt-5.4-high
• Sep 12, 2026 arena
  gpt-5.4
  gpt-5.4
• Sep 12, 2026 arena
  Claude Fable 5.1 (Max)
  Claude Fable 5.1 (Max)
• Sep 12, 2026 arena
  GPT 6 Astra (Max)
  GPT 6 Astra (Max)
• Sep 12, 2026 arena
  Claude Opus 5 (High)
  Claude Opus 5 (High)
• Sep 12, 2026 arena
  Claude Opus 5 (Max)
  Claude Opus 5 (Max)
• Sep 12, 2026 arena
  Claude Fable 5 (High)
  Claude Fable 5 (High)
• Sep 12, 2026 arena
  Claude Opus 4.8 (High)
  Claude Opus 4.8 (High)
• Sep 12, 2026 arena
  GPT 5.6 Sol (xHigh)
  GPT 5.6 Sol (xHigh)
• Sep 12, 2026 arena
  Kimi K3 (Max)
  Kimi K3 (Max)
• Sep 12, 2026 arena
  Claude Sonnet 5 (High)
  Claude Sonnet 5 (High)
• Sep 12, 2026 arena
  Hy4 preview
  Hy4 preview