GLM Latest is $0.6 cheaper per 1M input tokens (30% lower; 1.43x difference).
API cost decision in 10 seconds
NewGLM Latest vs GPT-5.6 Terra Pro
Pick GLM Latest for lower cost; pick GPT-5.6 Terra Pro only if the larger context window matters more.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick GLM Latest for lower cost; pick GPT-5.6 Terra Pro only if the larger context window matters more.
On the standard 1M input plus 500K output workload, GLM Latest is estimated at $3.6 vs $8 for GPT-5.6 Terra Pro, saving $4.4 (55% lower).
Cost-first pickGLM Latest
Context-first pickGPT-5.6 Terra Pro
Sample savings$4.455%
10x traffic gap$44
GPT-5.6 Terra Pro has more context, but GLM Latest saves $4.4 on the standard workload. At 10x that traffic, the same price gap is about $44. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
GLM Latest stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GLM Latest | GPT-5.6 Terra Pro |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | GLM Latest | $9.2 | $16 |
| Balanced workload | 1M input + 1M output | GLM Latest | $5.8 | $14 |
| Output-heavy chatbot | 1M input + 5M output | GLM Latest | $23.4 | $62 |
GLM Latest is $7.6 cheaper per 1M output tokens (63.3% lower; 2.73x difference).
GPT-5.6 Terra Pro has 1.42K more context (1x larger).
GLM Latest is $4.4 cheaper on the standard workload (55% lower).
Estimate your workload cost
Your Workload Cost
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.
Quick Decision
GLM Latest has the lower input price; GLM Latest has the lower output price; GPT-5.6 Terra Pro offers the larger context window. For the 1M input plus 500K output sample, GLM Latest is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $3.6 for GLM Latest and $8 for GPT-5.6 Terra Pro.
Choose GLM Latest when you care most about lower input-token price, and lower output-token price.
Choose GPT-5.6 Terra Pro when you care most about larger context window.
- On the standard 1M input plus 500K output workload, GLM Latest is estimated at $3.6 vs $8 for GPT-5.6 Terra Pro, saving $4.4 (55% lower).
- GLM Latest is $4.4 cheaper on the standard workload (55% lower).
- GLM Latest is $0.6 cheaper per 1M input tokens (30% lower; 1.43x difference).
- GLM Latest is $7.6 cheaper per 1M output tokens (63.3% lower; 2.73x difference).
- GPT-5.6 Terra Pro has 1.42K more context (1x larger).
| Feature | NewGLM Latest (Z.ai) | GPT-5.6 Terra Pro (OpenAI) |
|---|---|---|
| Input Price prompt tokens per 1M | $1.4 | $2 |
| Completion Price per 1M tokens | $4.4 | $12 |
| Sample Workload Cost 1M input + 500K output | $3.6 | $8 |
| Context Window | 1.05M | 1.05M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | GLM Latest | On the standard 1M input plus 500K output workload, GLM Latest is estimated at $3.6 vs $8 for GPT-5.6 Terra Pro, saving $4.4 (55% lower). |
| High-volume input processing | GLM Latest | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | GLM Latest | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-5.6 Terra Pro | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- GLM 5.2 (free) can replace GLM Latest when lower sample workload cost matters most: $0.
- GLM 4.5 Air (free) can replace GLM Latest when lower sample workload cost matters most: $0.
- GLM 4 32B can replace GLM Latest when lower sample workload cost matters most: $0.15.
- GLM 4.7 Flash can replace GLM Latest when lower sample workload cost matters most: $0.26.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
- DeepSeek V4 Flash 0731 · DeepSeek · #1
- MiMo-V2.5 · Xiaomi · #2
- Hy3 · Tencent · #3
- Ox Alpha · stealth · #4
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GPT-5.6 Terra Pro is the same underlying model as [GPT-5.6 Terra](https://openrouter.ai/openai/gpt-5.6-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode