Perceptron Mk1.5 is $0.22 cheaper per 1M input tokens (59.5% lower; 2.47x difference).
API cost decision in 10 seconds
NewPerceptron Mk1.5 vs GLM 5.3 FlashX
Pick Perceptron Mk1.5 for lower cost; pick GLM 5.3 FlashX only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Perceptron Mk1.5 for lower cost; pick GLM 5.3 FlashX only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Perceptron Mk1.5 is estimated at $0.9 vs $0.99 for GLM 5.3 FlashX, saving $0.09 (9.5% lower).
Cost-first pickPerceptron Mk1.5
Context-first pickGLM 5.3 FlashX
Sample savings$0.099.5%
10x traffic gap$0.95
GLM 5.3 FlashX has more context, but Perceptron Mk1.5 saves $0.09 on the standard workload. At 10x that traffic, the same price gap is about $0.95. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Cost winner changes by workload shape: input-heavy / RAG favors Perceptron Mk1.5, balanced workload favors GLM 5.3 FlashX, and output-heavy chatbot favors GLM 5.3 FlashX.
| Workload shape | Token mix | Better pick | Perceptron Mk1.5 | GLM 5.3 FlashX |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Perceptron Mk1.5 | $1.5 | $2.48 |
| Balanced workload | 1M input + 1M output | GLM 5.3 FlashX | $1.65 | $1.62 |
| Output-heavy chatbot | 1M input + 5M output | GLM 5.3 FlashX | $7.65 | $6.62 |
GLM 5.3 FlashX is $0.25 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
GLM 5.3 FlashX has 1.01M more context (28.4x larger).
Perceptron Mk1.5 is $0.09 cheaper on the standard workload (9.5% 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
Perceptron Mk1.5 has the lower input price; GLM 5.3 FlashX has the lower output price; GLM 5.3 FlashX offers the larger context window. For the 1M input plus 500K output sample, Perceptron Mk1.5 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0.9 for Perceptron Mk1.5 and $0.99 for GLM 5.3 FlashX.
Choose Perceptron Mk1.5 when you care most about lower input-token price.
Choose GLM 5.3 FlashX when you care most about lower output-token price, and larger context window.
- On the standard 1M input plus 500K output workload, Perceptron Mk1.5 is estimated at $0.9 vs $0.99 for GLM 5.3 FlashX, saving $0.09 (9.5% lower).
- Perceptron Mk1.5 is $0.09 cheaper on the standard workload (9.5% lower).
- Perceptron Mk1.5 is $0.22 cheaper per 1M input tokens (59.5% lower; 2.47x difference).
- GLM 5.3 FlashX is $0.25 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
- GLM 5.3 FlashX has 1.01M more context (28.4x larger).
| Feature | NewPerceptron Mk1.5 (Perceptron) | GLM 5.3 FlashX (Z.ai) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.15 | $0.37 |
| Completion Price per 1M tokens | $1.5 | $1.25 |
| Sample Workload Cost 1M input + 500K output | $0.9 | $0.99 |
| Context Window | 36.86K | 1.05M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Perceptron Mk1.5 | On the standard 1M input plus 500K output workload, Perceptron Mk1.5 is estimated at $0.9 vs $0.99 for GLM 5.3 FlashX, saving $0.09 (9.5% lower). |
| High-volume input processing | Perceptron Mk1.5 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | GLM 5.3 FlashX | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GLM 5.3 FlashX | 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 FlashX when lower sample workload cost matters most: $0.
- GLM 4.5 Air (free) can replace GLM 5.3 FlashX when lower sample workload cost matters most: $0.
- GLM 5.3 Flash can replace GLM 5.3 FlashX when lower sample workload cost matters most: $0.12.
- GLM Flash Latest can replace GLM 5.3 FlashX when lower sample workload cost matters most: $0.12.
- GLM 5.3 Flash offers 1.31M context with $0.12 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.19 sample workload cost.
- GLM Flash Latest offers 1.31M context with $0.12 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.19 sample workload cost.
- MiMo-V2.6-Pro · Xiaomi · #1
- GLM 5.3 Flash · Z.ai · #2
- DeepSeek V4.1 Flash · DeepSeek · #3
- Hy4 preview · Tencent · #4
Cheaper alternatives
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Open Z.ai modelsPerceptron Mk1.5 is Perceptron's embodied reasoning model for physical agents. It accepts text, image, video, and audio input, and answers with text plus optional structured annotations: points, boxes, polygons, tracks,...
GLM-5.3-FlashX is the high-speed variant of Z.ai's GLM-5.3-Flash, a native multimodal model delivering inference speeds of up to 200 tokens/s. Built on the same hybrid sparse and linear attention architecture...