GPT-5.6 Terra
GPT-5.6 model that balances intelligence and cost
GPT-5.6 Terra is an OpenAI GPT-5.6 model release designed to balance intelligence and cost for everyday work. It supports text and image input with text output, reasoning tokens, tool use, a 1,050,000-token context window, and 128,000 max output tokens.
Pricing
Model Intelligence
Recent stories
Practitioners reported better Codex multi-agent runs by raising concurrency and splitting work across Sol, Terra, and Luna. One workflow sends deploy tasks to Luna Max to preserve Sol tokens.
Sol-advisor routes Codex tasks through GPT-5.6 Sol, Luna, and Terra, while users compare Luna Max as a lower-cost reasoning setting. Early reports say small routing tests need larger benchmarks.
OpenAI said GPT-5.6 Luna pricing fell 80%, while Terra fell 20%. Codex users recommended max reasoning for linting, tests, and dependency work, but cautioned against forcing Luna into subagent roles.
OpenAI said GPT-5.6 Luna is 80% cheaper and Terra is 20% cheaper, with lower usage burn in Codex and ChatGPT Work. Sol Fast adds up to 2.5x speed at 2x price, and gateways reflected the new pricing.