# GPT-5.6 Terra vs GPT-6 Sol

As of Oct 15, 2026, GPT-5.6 Terra leads GPT-6 Sol in 5 of 10 shared categories: General LLM, Reasoning, Long context, Factuality, and Abstraction (ARC).

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

GPT-6 Sol: $4.000000000000001 per 1M blended tokens.

GPT-5.6 Terra: closed weights.

GPT-6 Sol: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.6 Terra leads GPT-6 Sol in General LLM at #44 against #54.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.6 Terra leads GPT-6 Sol in Reasoning at #41 against #49.
- Which to pick, Science: As of Oct 15, 2026, GPT-6 Sol leads GPT-5.6 Terra in Science at #8 against #15.
- Which to pick, Coding: As of Oct 15, 2026, GPT-6 Sol leads GPT-5.6 Terra in Coding at #5 against #13.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, GPT-6 Sol leads GPT-5.6 Terra in Coding › Agentic at #5 against #13.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GPT-6 Sol leads GPT-5.6 Terra in Coding › Web dev at #7 against #44.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.6 Terra leads GPT-6 Sol in Long context at #54 against #57.
- Which to pick, Vision: As of Oct 15, 2026, GPT-6 Sol leads GPT-5.6 Terra in Vision at #9 against #11.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.6 Terra leads GPT-6 Sol in Factuality at #28 against #88.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.6 Terra leads GPT-6 Sol in Abstraction (ARC) at #4 against #6.

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, GPT-6 Sol is ranked #5 in Coding (since Oct 15, 2026; sources Terminal-Bench 4.0; methodology v1.0).