# GLM 5.3 vs GPT-6 Luna

As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in 8 of 8 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.

GLM 5.3: $1.275 per 1M blended tokens.

GPT-6 Luna: $0.19999999999999998 per 1M blended tokens.

GLM 5.3: open weights.

GPT-6 Luna: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in General LLM at #24 against #82.
- Which to pick, Reasoning: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in Reasoning at #19 against #76.
- Which to pick, Science: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in Science at #28 against #33.
- Which to pick, Coding: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in Coding at #7 against #17.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in Coding › Agentic at #7 against #17.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in Coding › Web dev at #20 against #31.
- Which to pick, Long context: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in Long context at #31 against #75.
- Which to pick, Factuality: As of Oct 15, 2026, GLM 5.3 leads GPT-6 Luna in Factuality at #31 against #45.

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-6 Luna is state of the art on best per dollar in Coding (since Oct 14, 2026; sources Terminal-Bench 4.0; methodology v1.0).