| Provider | Z.ai |
|---|---|
| Model ID | z-ai/glm-5.1 |
| Prompt Price per 1M tokens | $0.98 |
| Completion Price per 1M tokens | $3.08 |
| Sample Workload Cost 1M input + 500K output | $2.52 |
| Context Window | 202.75K |
| Release Date | |
| Popularity | #24 |
| Popularity Signal | 54.7B tokens |
GLM 5.1
Z.ai API model specs with normalized input price, output price, context window, sample workload cost, and related comparisons.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget brief
GLM 5.1 is estimated at $2.52 for the standard workload.
GLM 5.1 is best suited for general API evaluation. A 1M input token plus 500K output token workload is estimated at $2.52.
Input price$0.98per 1M tokens
Output price$3.08per 1M tokens
Context window202.75Kreported maximum
Popularity#2454.7B tokens signal volume
Use this as a first-pass planning estimate, then verify provider limits, routing, discounts, and availability before production deployment.
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This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Alternative path
Alternative Shortlist
Use these rows to build a test shortlist around GLM 5.1. Lower cost, same-provider fit, and larger context are separate decisions, so each group is ranked by a different signal.
Lower-cost alternatives
Cross-provider candidates with a lower standard 1M input plus 500K output estimate.
| Model | Provider | Sample Cost | Context | Why it is here | Next Step |
|---|---|---|---|---|---|
| 🔥Owl Alpha | OpenRouter | $0 | 1.05M | Lower standard workload estimate from another provider. | Open model Compare |
| New🔥Nemotron 3 Ultra (free) | NVIDIA | $0 | 1M | Lower standard workload estimate from another provider. | Open model Compare |
| 🔥Laguna M.1 (free) | Poolside | $0 | 262.14K | Lower standard workload estimate from another provider. | Open model Compare |
| Nemotron 3 Super (free) | NVIDIA | $0 | 1M | Lower standard workload estimate from another provider. | Open model Compare |
Same-provider swaps
Lower-cost options from the same provider, useful when account setup or procurement is already fixed.
| Model | Provider | Sample Cost | Context | Why it is here | Next Step |
|---|---|---|---|---|---|
| GLM 4.5 Air (free) | Z.ai | $0 | 131.07K | Same provider with a lower standard workload estimate. | Open model Compare |
| GLM 4 32B | Z.ai | $0.15 | 128K | Same provider with a lower standard workload estimate. | Open model Compare |
| GLM 4.7 Flash | Z.ai | $0.26 | 202.75K | Same provider with a lower standard workload estimate. | Open model Compare |
| GLM 4.5 Air | Z.ai | $0.55 | 131.07K | Same provider with a lower standard workload estimate. | Open model Compare |
Larger-context upgrades near this budget
Models with more context that stay within a close sample-cost band when price data is available.
| Model | Provider | Sample Cost | Context | Why it is here | Next Step |
|---|---|---|---|---|---|
| Llama 4 Scout | Meta | $0.25 | 10M | More context while staying near this model's sample-cost band. | Open model Compare |
| Grok 4.20 | xAI | $2.5 | 2M | More context while staying near this model's sample-cost band. | Open model Compare |
| Grok 4.20 Multi-Agent | xAI | $2.5 | 2M | More context while staying near this model's sample-cost band. | Open model Compare |
| 🔥Owl Alpha | OpenRouter | $0 | 1.05M | More context while staying near this model's sample-cost band. | Open model Compare |
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...
GLM 5.1 is best suited for general API evaluation.
A 1M input token plus 500K output token workload is estimated at $2.52.
Decision Shortcuts
Compare this model
Search head-to-head pages that include GLM 5.1 and review input price, output price, context, and sample workload cost.
Find comparisonsZ.ai catalog
See other Z.ai models before narrowing your shortlist.
Open provider hubCheaper alternatives
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Browse low-cost modelsLong-context alternatives
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Browse long-context modelsHigh-Interest Comparisons
Search this model| Comparison | Cost-first Pick | Context Pick |
|---|---|---|
| GLM 5.1 vs Ring-2.6-1T | Ring-2.6-1T | Ring-2.6-1T |
| GLM 5.1 vs Free Models Router | Free Models Router | GLM 5.1 |
| 🔥Hy3 preview vs GLM 5.1 | Hy3 preview | Hy3 preview |
| 🔥Owl Alpha vs GLM 5.1 | Owl Alpha | Owl Alpha |
| GLM 5.1 vs Cogito v2.1 671B | Cogito v2.1 671B | GLM 5.1 |
| GLM 5.1 vs MiniMax M2.5 | MiniMax M2.5 | MiniMax M2.5 |
| 🔥DeepSeek V4 Flash vs GLM 5.1 | DeepSeek V4 Flash | DeepSeek V4 Flash |
| GLM 5.1 vs GLM 5 Turbo | GLM 5.1 | GLM 5 Turbo |
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