GPT-5.6 Terra vs GLM-5.3
⚖ GLM-5.3 wins 4 of 4 categories and costs less: 2.1× cheaper for everyday text work. Easy pick.
Scores by category
| Category | GPT-5.6 Terra | GLM-5.3 |
|---|---|---|
| Overall | 60 | 61 |
| Writing | 53 | 70 |
| Support | 57 | 67 |
| Coding | 54 | 68 |
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
| GPT-5.6 Terra | GLM-5.3 | |
|---|---|---|
| Vendor | OpenAI | Z.ai |
| Released | 2026-07-09 | 2026-08-14 |
| Context window | 1.1M | 1M |
| Open weights | No | Yes |
| Input per 1M tokens | $2.00 | $1.40 |
| Output per 1M tokens | $12.00 | $4.40 |
| Per 1,000 tasks | $9.00 | $4.30 |