# Claude Sonnet 5.5 vs GPT-6.1 Sol

As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in 6 of 9 shared categories: Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.

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

GPT-6.1 Sol: $4.000000000000001 per 1M blended tokens.

Claude Sonnet 5.5: closed weights.

GPT-6.1 Sol: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-6.1 Sol leads Claude Sonnet 5.5 in General LLM at #18 against #29.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-6.1 Sol leads Claude Sonnet 5.5 in Reasoning at #15 against #18.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Science at #3 against #4.
- Which to pick, Coding: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Coding at #1 against #2.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Coding › Agentic at #1 against #2.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Coding › Web dev at #3 against #4.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Long context at #11 against #18.
- Which to pick, Vision: As of Oct 15, 2026, Claude Sonnet 5.5 and GPT-6.1 Sol share #1 in Vision.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6.1 Sol in Factuality at #17 against #33.

As of Oct 15, 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 15, 2026, GPT-6.1 Sol is tied for state of the art in Vision (since Sep 30, 2026; sources GDP.pdf; methodology v1.0).