Anthropic announced alongside its September 22, 2026 Opus 5.5 launch that Claude Haiku 5.5 would follow in the coming weeks, marking the first Haiku update since 4.5 in October 2025 while the rest of the lineup advanced to 5.x versions. The current Haiku 4.5 remains active with retirement no sooner than mid-October 2026, creating a gap that positions any successor as a competitive response to faster, cheaper rivals in high-volume tasks. Text Arena has previously hosted Haiku 4.5 and is now testing Sonnet 5.5 in direct mode, reflecting Anthropic’s pattern of using community benchmarks for visibility before or alongside API rollout. Traders watch for confirmation of the model ID, pricing, and any early Arena listing as signals of debut timing amid ongoing 5.5 family releases.
Polymarketデータを参照したAI生成の実験的な要約。これは取引アドバイスではなく、このマーケットの解決方法には一切関係ありません。 · 更新日View resolved

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