GLM-5.3 vs GPT-5.6 Terra
⚖ GLM-5.3 wins 4 of 4 categories and costs less: 2.1× cheaper for everyday text work. Easy pick.
Scores by category
| Category | GLM-5.3 | GPT-5.6 Terra |
|---|---|---|
| Overall | 61 | 60 |
| Writing | 70 | 53 |
| Support | 67 | 57 |
| Coding | 68 | 54 |
Provisional scores, 0 to 100 among the models we track, from Arena and Epoch AI. Value weighs the overall score against cost.
Price and specs
| GLM-5.3 | GPT-5.6 Terra | |
|---|---|---|
| Vendor | Z.ai | OpenAI |
| Released | 2026-08-14 | 2026-07-09 |
| Context window | 1M | 1.1M |
| Open weights | Yes | No |
| Input per 1M tokens | $1.40 | $2.00 |
| Output per 1M tokens | $4.40 | $12.00 |
| Per 1,000 tasks | $4.30 | $9.00 |