OpenAI, led by Worldcoin co-founder Sam Altman, opened a limited preview of its next-generation GPT-5.6 model family on June 26, drawing fresh attention to Worldcoin (WLD). The preview reached a small set of trusted partner organizations through OpenAI’s API and its Codex coding tool. The GPT-5.6 series spans three tiers, each tuned to a different workload and price point, with pricing running per million tokens: the flagship costs five dollars for input and thirty dollars for output, the mid tier roughly halves that, and the fastest, cheapest option lands at one dollar input and six dollars output. OpenAI tagged the three tiers Sol, Terra and Luna, stirring the crypto community as Sol shares its label with Solana’s SOL ticker, while Terra and Luna echo the brand behind the 2022 collapse that wiped out an algorithmic-stablecoin ecosystem. Before the preview, OpenAI shared GPT-5.6’s capabilities and rollout plans with the United States government and began distribution in a restricted form partly at the government’s request. OpenAI said it plans to widen access through ChatGPT, Codex and its API over the coming weeks. The flagship GPT-5.6 Sol model runs on chips from Cerebras, hitting inference speeds of up to 750 tokens per second.