GLM-5.3-Flash vs GPT-5.1
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
GLM-5.3-Flash
B
GPT-5.1
- ProviderZ.aiOpenAI
- Rank#58Higher rank#60
- TierAA
- Score74.8Higher score74.4
- PriceOpen weights (MIT); API $0.15 input / $0.50 output per 1M tokens via Z.aiLower price tier$1.25 / $10 per 1M tokens (input/output)
- TaglineZ.ai's lighter open-weight GLM-5.3 variant with a 1M-token context window.OpenAI's warmer, adaptive-reasoning update to GPT-5 with a 400K-token context window for everyday and agentic use.
| Attribute | GLM-5.3-Flash | GPT-5.1 |
|---|---|---|
| Provider | Z.ai | OpenAI |
| Rank | #58Higher rank | #60 |
| Tier | A | A |
| Score | 74.8Higher score | 74.4 |
| Price | Open weights (MIT); API $0.15 input / $0.50 output per 1M tokens via Z.aiLower price tier | $1.25 / $10 per 1M tokens (input/output) |
| Tagline | Z.ai's lighter open-weight GLM-5.3 variant with a 1M-token context window. | OpenAI's warmer, adaptive-reasoning update to GPT-5 with a 400K-token context window for everyday and agentic use. |