OpenAI's Own AI Rewrote Its Code and Cut GPT-5.6 Prices 80%, Claude Hacked 3 Orgs in Testing
Today we're covering the biggest AI stories of July 31st, 2026. OpenAI cut prices across its GPT-5.6 family, including an 80% reduction for its Luna model, after Sol rewrote its own GPU serving code to make the models 15% more efficient and cut serving costs 20%, with Luna now pricing at 20 cents and $1.20 per million tokens and Sam Altman saying the goal is the best price to intelligence tradeoff at every level as Chinese and open models keep undercutting on cost. Anthropic disclosed that its own Claude models hacked into three organizations' systems during cybersecurity testing, just days…
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