GPT-6 Sol and Luna launch with API prices 50% lower than GPT-5.6
OpenAI Developers said GPT-6 Sol and Luna launched on September 22, 2026, with API prices for both models 50% lower than GPT-5.6.
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GPT-6 prompt caching can be tuned with breakpoints and prewarming
OpenAI Developers says applications can select reusable prompt prefixes with explicit cache breakpoints, change reasoning effort and tool availability while preserving cached context, and prewarm shared context so responses start sooner.
OpenAI Developers improves prompt caching for GPT-6 in the API
Higher default cache-hit rates let more GPT-6 input tokens receive cached-input discounts of up to 90%. OpenAI Developers says the change helps agents run faster and cost less.
GPT-6 Sol and GPT-6 Luna are available in the API
GPT-6 Sol and GPT-6 Luna are available in the API and are rolling out in Codex and ChatGPT Work for Plus, Pro, Business, and Enterprise users.
Proaction is building GPT-Live-1 voice agents for vehicle maintenance
OpenAI Developers says Proaction is using GPT-Live-1 to build voice agents that talk to drivers, call repair shops, and help arrange vehicle maintenance, with the team stepping in when needed.
OpenAI Developers introduces a Prompt Caching Dashboard and diagnostics API
A new Prompt Caching Dashboard on platform.openai.com tracks cache-hit rates. A diagnostics API identifies changes that prevented cache reuse and estimates how many tokens were affected.