Meta Muse Spark 1.1, GPT-5.6 launch via AI Gateway; Rust 1.97 ships

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Meta released Muse Spark 1.1, a 1-million-token agentic model supporting native parallel tool calling and structured output, now available through AI Gateway alongside OpenAI's new GPT-5.6 family. GPT-5.6 launches in three tiers — Sol, Terra, and Luna — differentiated by capability, cost, and latency, with tier-switching handled via configuration rather than code changes. Terra's pricing is roughly half that of its predecessor, making it an immediate candidate for cost-sensitive agentic workloads. Separately, an OpenAI audit of the SWE-Bench Pro coding benchmark found approximately 30% of its public tasks were flawed, raising serious questions about the reliability of leaderboard scores used for model selection. Rust 1.97 also shipped this week, delivering a default behavior change that has been in development for several years.

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