Perceptron Mk1 is $29.85 cheaper per 1M input tokens (99.5% lower; 200x difference).
API cost decision in 10 seconds
NewPerceptron Mk1 vs GPT-5.4 Pro
Pick Perceptron Mk1 for lower cost; pick GPT-5.4 Pro 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 for lower cost; pick GPT-5.4 Pro only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Perceptron Mk1 is estimated at $0.9 vs $120 for GPT-5.4 Pro, saving $119.1 (99.2% lower).
Cost-first pickPerceptron Mk1
Context-first pickGPT-5.4 Pro
Sample savings$119.199.2%
10x traffic gap$1191
GPT-5.4 Pro has more context, but Perceptron Mk1 saves $119.1 on the standard workload. At 10x that traffic, the same price gap is about $1191. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Perceptron Mk1 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Perceptron Mk1 | GPT-5.4 Pro |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Perceptron Mk1 | $1.5 | $240 |
| Balanced workload | 1M input + 1M output | Perceptron Mk1 | $1.65 | $210 |
| Output-heavy chatbot | 1M input + 5M output | Perceptron Mk1 | $7.65 | $930 |
Perceptron Mk1 is $178.5 cheaper per 1M output tokens (99.2% lower; 120x difference).
GPT-5.4 Pro has 1.02M more context (32x larger).
Perceptron Mk1 is $119.1 cheaper on the standard workload (99.2% 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 has the lower input price; Perceptron Mk1 has the lower output price; GPT-5.4 Pro offers the larger context window. For the 1M input plus 500K output sample, Perceptron Mk1 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 and $120 for GPT-5.4 Pro.
Choose Perceptron Mk1 when you care most about lower input-token price, and lower output-token price.
Choose GPT-5.4 Pro when you care most about larger context window.
- On the standard 1M input plus 500K output workload, Perceptron Mk1 is estimated at $0.9 vs $120 for GPT-5.4 Pro, saving $119.1 (99.2% lower).
- Perceptron Mk1 is $119.1 cheaper on the standard workload (99.2% lower).
- Perceptron Mk1 is $29.85 cheaper per 1M input tokens (99.5% lower; 200x difference).
- Perceptron Mk1 is $178.5 cheaper per 1M output tokens (99.2% lower; 120x difference).
- GPT-5.4 Pro has 1.02M more context (32x larger).
| Feature | NewPerceptron Mk1 (Perceptron) | GPT-5.4 Pro (OpenAI) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.15 | $30 |
| Completion Price per 1M tokens | $1.5 | $180 |
| Sample Workload Cost 1M input + 500K output | $0.9 | $120 |
| Context Window | 32.77K | 1.05M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Perceptron Mk1 | On the standard 1M input plus 500K output workload, Perceptron Mk1 is estimated at $0.9 vs $120 for GPT-5.4 Pro, saving $119.1 (99.2% lower). |
| High-volume input processing | Perceptron Mk1 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Perceptron Mk1 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-5.4 Pro | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT-5.4 Pro when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-5.4 Pro when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-5.4 Pro when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace GPT-5.4 Pro when lower sample workload cost matters most: $0.13.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
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