13 Jul 2026 - New GPT-5.6 models

CODEXIS AI now lets you select the new generation of OpenAI models — the GPT-5.6 family. You choose the model before starting a new conversation in the model and response profile selection.

New GPT-5.6 models

The model selection now includes a new generation of language models from OpenAI — the GPT-5.6 family:

• GPT-5.6 Sol — the most capable model in the GPT-5.6 family. Reach for it in tasks where the highest possible quality and reliability of the answer is the priority.
• GPT-5.6 Terra — a balanced model combining high quality, reasonable speed and a lower price than GPT-5.6 Sol. At default settings it costs the same as GPT-5.4.
• GPT-5.6 Luna — the fastest and most cost-efficient model in the GPT-5.6 family. It is best suited for simpler, repetitive or high-volume tasks.

The default model is GPT-5.6 Terra.