gpt-5.6-terra

Terra is the well-balanced daily productivity model within the GPT-5.6 lineup. It delivers overall performance on par with GPT-5.5, the previous-generation flagship, while slashing inference costs by half, positioning it as the general-purpose workhorse for enterprise online operations. It fully inherits all core capabilities of the entire GPT-5.6 family: a 1.5-million-token ultra-long context window, native image vision input, multi-step deep reasoning, the full Codex code toolchain, and functi