OpenAI's GPT-5.6 launches Thursday after a delay forced by the U.S. government

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OpenAI is launching GPT-5.6 on Thursday after the U.S. government lifted the initial release ban following additional testing.

According to OpenAI, the Sol model outperforms Anthropic's Claude Mythos 5 in the coding benchmark while costing about half as much.

Binding standards for future model approvals are still lacking.

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