# GPT-5.6 Terra vs O4 Mini

As of Oct 15, 2026, GPT-5.6 Terra leads O4 Mini in 5 of 5 shared categories: General LLM, Reasoning, Science, Factuality, and Abstraction (ARC).

GPT-5.6 Terra: $4.5 per 1M blended tokens.

O4 Mini: $1.9250000000000003 per 1M blended tokens.

GPT-5.6 Terra: closed weights.

O4 Mini: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.6 Terra leads O4 Mini in General LLM at #44 against #162.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.6 Terra leads O4 Mini in Reasoning at #41 against #168.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.6 Terra leads O4 Mini in Science at #15 against #70.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.6 Terra leads O4 Mini in Factuality at #28 against #160.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.6 Terra leads O4 Mini in Abstraction (ARC) at #4 against #39.

As of Oct 15, 2026, GPT-5.6 Terra is ranked #4 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; methodology v1.0).

As of Oct 15, 2026, O4 Mini is a former state-of-the-art holder in Math (since Jul 20, 2025; sources Humanity's Last Exam; methodology v1.0).