GLM-5.3-FlashX vs GPT-6.1 Terra: Pricing and Specs
GLM-5.3-FlashX $0.37 / $1.25 vs GPT-6.1 Terra $1 / $5 per 1M tokens in / out.
| GLM-5.3-FlashX | GPT-6.1 Terra | |
|---|---|---|
| Maker | Z.ai | OpenAI |
| Input, per 1M tokens | $0.37 | $1 |
| Output, per 1M tokens | $1.25 | $5 |
| Context window | 1M tokens z.ai | 1,050,000 tokens openai.com |
| Max output | 128K tokens z.ai | 128,000 tokens openai.com |
| Input types | Video, Image, Text, File z.ai | Text, Image openai.com |
| Output types | Text z.ai | Text openai.com |
| Released | Not published in the docs we read | Oct 26, 2026 openai.com |
| Price checked | Nov 9, 2026 z.ai | Nov 9, 2026 openai.com |
| Tracked changes | 0 | 0 |
Facts side by side from each maker's own pages. No score and no verdict.
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Questions
Which is cheaper, GLM-5.3-FlashX or GPT-6.1 Terra
By listed price, GLM-5.3-FlashX is lower: $0.37 vs $1 per 1M input tokens. Price is the only thing this answer compares.
What do 1M input and 1M output tokens cost on each
GLM-5.3-FlashX: $1.62. GPT-6.1 Terra: $6. Listed standard prices, before caching or batch discounts.
What context window does each have
GLM-5.3-FlashX: 1M tokens. GPT-6.1 Terra: 1,050,000 tokens. From each maker's docs.
Who makes GLM-5.3-FlashX and GPT-6.1 Terra
GLM-5.3-FlashX is made by Z.ai. GPT-6.1 Terra is made by OpenAI.