TMTPOST — iFlytek said it will formally release its Spark X2.5 (293 billion parameters) base model on Sept. 7, further upgrading capabilities in coding and agents. On Sept. 1 the company plans to open-source two edge-side general models, Spark X2.5-4B and Spark X2.5-1.7B. Both natively support a context window of up to 1 million tokens and focus on improving agent, mathematics and general-understanding performance for vehicle, smart-hardware and Internet-of-Things scenarios. At its 2026 interim results briefing, iFlytek had indicated it would launch a new flagship general large model trained entirely on domestic computing power at this year’s Global 1024 Developer Festival.