EventAI ModelsSeptember 24, 2026

Anthropic reportedly stealth-testing Sonnet 5.5 with 1M-token context

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Leaker posts say Sonnet 5.5 is in stealth testing with a 1M-token context window, 128K max output, and pricing of $2 per 1M input tokens and $10 per 1M output tokens. Opus 5.5 (codename "claude-wafer-eap") and Haiku 5.5 are also rumored for release in the coming weeks.

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