OpenAI Launches GPT-5.6 and GPT-Live; Meta Releases Muse Spark 1.1
OpenAI officially released the GPT-5.6 model series on July 9, 2026, ending a 12-day restricted government preview and making three models — Sol, Terra, and Luna — publicly available at tiered pricing. Sol, the flagship model, achieved top scores on coding and cybersecurity benchmarks, while a new 'durable capability tier' system means model names reflect capability levels rather than version numbers. Alongside this, OpenAI merged its Codex tool into the ChatGPT desktop app and launched ChatGPT Work, a unified interface for chat, coding, and long-running agent tasks. OpenAI also rolled out GPT-Live on July 8, a full-duplex voice model capable of simultaneous listening and speaking, real-time translation, and natural turn-taking without the delays of previous voice systems. On the same day as GPT-5.6's release, Meta launched Muse Spark 1.1, an agentic and coding-focused model that outperformed Claude Opus 4.8 on key agent benchmarks, prompting CEO Mark Zuckerberg to post on X for the first time in three years.
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