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OpenAI launched the GPT-6 Sol and GPT-6 Luna models for use in ChatGPT, Codex, and GitHub Copilot, cutting API prices in half compared with the prices of comparable GPT-5.6 models. The models deliver improved performance in some programming and alignment tests, but safety evaluations reveal continuing challenges in monitoring and responding to malicious instructions.
Anthropic announced the Opus 5.5 model, while OpenAI unveiled GPT-6 Sol and GPT-6 Luna, with a shared focus on reducing usage costs and improving coding and adherence to safety controls. The results of the comparisons and proposals for external evaluation standards still require independent verification.