GLM 5.3 is $3.6 cheaper per 1M input tokens (72% lower; 3.57x difference).
API cost decision in 10 seconds
NewGLM 5.3 vs GPT Chat Latest
Pick GLM 5.3 when budget and context both matter.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick GLM 5.3 when budget and context both matter.
On the standard 1M input plus 500K output workload, GLM 5.3 is estimated at $3.6 vs $20 for GPT Chat Latest, saving $16.4 (82% lower).
Cost-first pickGLM 5.3
Context-first pickGLM 5.3
Sample savings$16.482%
10x traffic gap$164
GLM 5.3 is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $164. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
GLM 5.3 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GLM 5.3 | GPT Chat Latest |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | GLM 5.3 | $9.2 | $40 |
| Balanced workload | 1M input + 1M output | GLM 5.3 | $5.8 | $35 |
| Output-heavy chatbot | 1M input + 5M output | GLM 5.3 | $23.4 | $155 |
GLM 5.3 is $25.6 cheaper per 1M output tokens (85.3% lower; 6.82x difference).
GLM 5.3 has 648.58K more context (2.62x larger).
GLM 5.3 is $16.4 cheaper on the standard workload (82% 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 5.3 has the lower input price; GLM 5.3 has the lower output price; GLM 5.3 offers the larger context window. For the 1M input plus 500K output sample, GLM 5.3 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 5.3 and $20 for GPT Chat Latest.
Choose GLM 5.3 when you care most about lower input-token price, lower output-token price, and larger context window.
Choose GPT Chat Latest when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, GLM 5.3 is estimated at $3.6 vs $20 for GPT Chat Latest, saving $16.4 (82% lower).
- GLM 5.3 is $16.4 cheaper on the standard workload (82% lower).
- GLM 5.3 is $3.6 cheaper per 1M input tokens (72% lower; 3.57x difference).
- GLM 5.3 is $25.6 cheaper per 1M output tokens (85.3% lower; 6.82x difference).
- GLM 5.3 has 648.58K more context (2.62x larger).
| Feature | NewGLM 5.3 (Z.ai) | GPT Chat Latest (OpenAI) |
|---|---|---|
| Input Price prompt tokens per 1M | $1.4 | $5 |
| Completion Price per 1M tokens | $4.4 | $30 |
| Sample Workload Cost 1M input + 500K output | $3.6 | $20 |
| Context Window | 1.05M | 400K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | GLM 5.3 | On the standard 1M input plus 500K output workload, GLM 5.3 is estimated at $3.6 vs $20 for GPT Chat Latest, saving $16.4 (82% lower). |
| High-volume input processing | GLM 5.3 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | GLM 5.3 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GLM 5.3 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- GLM 5.2 (free) can replace GLM 5.3 when lower sample workload cost matters most: $0.
- GLM 4.5 Air (free) can replace GLM 5.3 when lower sample workload cost matters most: $0.
- GLM 4 32B can replace GLM 5.3 when lower sample workload cost matters most: $0.15.
- GLM 4.7 Flash can replace GLM 5.3 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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