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Anthropic launches Claude Sonnet 5.5, a faster, lower-cost mid-tier model in the Claude 5.5 lineup Model release
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TLDRocket
28 September 2026
Meta’s push to turn its agent tooling into enterprise software set the tone, but the day’s real throughline was what happens after you give an agent a login. Meta hired MongoDB CEO CJ Desai to lead the new Meta Enterprise Platform, aiming to sell deployable AI services built around Muse agents. Early signals are tactical rather than grand: Meta’s Muse Spark 1.3 reportedly uses about 25% fewer tokens for coding tasks, and it already charges developers $1.25 per million input tokens and $4.25 per million output tokens. The unanswered question hung in the air—Meta’s enterprise stack description left Llama out—while security features like Muse Confidential VM are slated “later this year,” underscoring that enterprise buyers want controllability as much as capability.
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