# GLM 5.3 vs GPT-5.6 Luna

As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in 7 of 8 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.

GLM 5.3: $1.275 per 1M blended tokens.

GPT-5.6 Luna: $0.44999999999999996 per 1M blended tokens.

GLM 5.3: open weights.

GPT-5.6 Luna: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in General LLM at #24 against #66.
- Which to pick, Reasoning: As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in Reasoning at #19 against #69.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.6 Luna leads GLM 5.3 in Science at #25 against #28.
- Which to pick, Coding: As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in Coding at #7 against #16.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in Coding › Agentic at #7 against #16.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in Coding › Web dev at #20 against #46.
- Which to pick, Long context: As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in Long context at #31 against #80.
- Which to pick, Factuality: As of Oct 15, 2026, GLM 5.3 leads GPT-5.6 Luna in Factuality at #31 against #39.

As of Oct 15, 2026, GLM 5.3 is tied for state of the art in General LLM (since Oct 13, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, GPT-5.6 Luna is ranked #16 in Coding (since Oct 15, 2026; sources Terminal-Bench 4.0; methodology v1.0).