# Claude Sonnet 4 vs GPT-5.6 Terra

As of Oct 15, 2026, Claude Sonnet 4 leads GPT-5.6 Terra in 0 of 5 shared categories.

Claude Sonnet 4: $6 per 1M blended tokens.

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

Claude Sonnet 4: closed weights.

GPT-5.6 Terra: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.6 Terra leads Claude Sonnet 4 in General LLM at #44 against #163.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.6 Terra leads Claude Sonnet 4 in Reasoning at #41 against #149.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.6 Terra leads Claude Sonnet 4 in Science at #15 against #97.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.6 Terra leads Claude Sonnet 4 in Long context at #54 against #123.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.6 Terra leads Claude Sonnet 4 in Abstraction (ARC) at #4 against #67.

As of Oct 15, 2026, Claude Sonnet 4 is ranked #35 in Math (since Oct 15, 2026; sources Humanity's Last Exam; methodology v1.0).

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).