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OpenAI's GPT-5.6 to launch late June 2026 with 1.5M context window

OpenAI is preparing to launch GPT-5.6 in late June 2026, featuring a 1.5 million token context window and improved efficiency for complex, multi-step tasks. Chief scientist Jakub Pachocki described it as a significant advancement. This release occurs as OpenAI, under CEO Sam Altman, faces increased scrutiny from investors and regulators ahead of a potential public offering. AI

IMPACT This release is expected to significantly advance agentic AI capabilities, potentially accelerating enterprise adoption of complex, multi-step AI tasks.

RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

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OpenAI's GPT-5.6 to launch late June 2026 with 1.5M context window

COVERAGE [1]

  1. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    OpenAI's GPT-5.6 is set to redefine agentic AI with its 1.5 million token context window and enhanced efficiency, arriving late June 2026. Chief scientist Jakub

    OpenAI's GPT-5.6 is set to redefine agentic AI with its 1.5 million token context window and enhanced efficiency, arriving late June 2026. Chief scientist Jakub Pachocki calls it a 'meaningful improvement,' designed for complex, multi-step tasks. This release also coincides with …