# Claude Sonnet 5.5 vs GPT-5.6 Terra

As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in 9 of 9 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

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

Claude Sonnet 5.5: closed weights.

GPT-5.6 Terra: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in General LLM at #27 against #35.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Reasoning at #18 against #35.
- Which to pick, Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Science at #3 against #15.
- Which to pick, Coding: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Coding at #1 against #13.
- Which to pick, Coding › Agentic: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Coding › Agentic at #1 against #13.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Coding › Web dev at #3 against #42.
- Which to pick, Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Long context at #11 against #46.
- Which to pick, Vision: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Vision at #1 against #11.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Factuality at #16 against #24.

As of Oct 14, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; methodology v1.0).

As of Oct 14, 2026, GPT-5.6 Terra is ranked #4 in Abstraction (ARC) (since Oct 14, 2026; sources ARC-AGI; methodology v1.0).