# GLM 5.3 Flash vs GPT-5.6 Terra

As of Oct 15, 2026, GLM 5.3 Flash leads GPT-5.6 Terra in 6 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, and Long context.

GLM 5.3 Flash: $0.2375 per 1M blended tokens.

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

GLM 5.3 Flash: open weights.

GPT-5.6 Terra: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GLM 5.3 Flash leads GPT-5.6 Terra in General LLM at #34 against #44.
- Which to pick, Reasoning: As of Oct 15, 2026, GLM 5.3 Flash leads GPT-5.6 Terra in Reasoning at #27 against #41.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.6 Terra leads GLM 5.3 Flash in Science at #15 against #34.
- Which to pick, Coding: As of Oct 15, 2026, GLM 5.3 Flash leads GPT-5.6 Terra in Coding at #10 against #13.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, GLM 5.3 Flash leads GPT-5.6 Terra in Coding › Agentic at #10 against #13.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GLM 5.3 Flash leads GPT-5.6 Terra in Coding › Web dev at #24 against #44.
- Which to pick, Long context: As of Oct 15, 2026, GLM 5.3 Flash leads GPT-5.6 Terra in Long context at #35 against #54.
- Which to pick, Vision: As of Oct 15, 2026, GPT-5.6 Terra leads GLM 5.3 Flash in Vision at #11 against #29.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.6 Terra leads GLM 5.3 Flash in Factuality at #28 against #34.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.6 Terra leads GLM 5.3 Flash in Abstraction (ARC) at #4 against #14.

As of Oct 15, 2026, GLM 5.3 Flash is state of the art on best per dollar in Coding (since Oct 14, 2026; sources Terminal-Bench 4.0; methodology v1.0).

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).