API cost decision in 10 seconds

🔥GPT-5.5 vs NewPerceptron Mk1

Pick Perceptron Mk1 for lower cost; pick GPT-5.5 only if the larger context window matters more.

Page updated: 2026-05-26T12:03:47Z Data confirmed: 2026-05-26T13:08:02Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Perceptron Mk1 for lower cost; pick GPT-5.5 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 $20 for GPT-5.5, saving $19.1 (95.5% lower).

Cost-first pickPerceptron Mk1

Context-first pickGPT-5.5

Sample savings$19.195.5%

10x traffic gap$191

GPT-5.5 has more context, but Perceptron Mk1 saves $19.1 on the standard workload. At 10x that traffic, the same price gap is about $191. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Perceptron Mk1 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	GPT-5.5	Perceptron Mk1
Input-heavy / RAG	5M input + 500K output	Perceptron Mk1	$40	$1.5
Balanced workload	1M input + 1M output	Perceptron Mk1	$35	$1.65
Output-heavy chatbot	1M input + 5M output	Perceptron Mk1	$155	$7.65

Cheaper input Perceptron Mk1 $5 vs $0.15 / 1M

Perceptron Mk1 is $4.85 cheaper per 1M input tokens (97% lower; 33.3x difference).

Cheaper output Perceptron Mk1 $30 vs $1.5 / 1M

Perceptron Mk1 is $28.5 cheaper per 1M output tokens (95% lower; 20x difference).

Larger context GPT-5.5 1.05M vs 32.77K

GPT-5.5 has 1.02M more context (32x larger).

Sample workload Perceptron Mk1 $20 vs $0.9

Perceptron Mk1 is $19.1 cheaper on the standard workload (95.5% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GPT-5.5 Calculating… Estimated API cost

Perceptron Mk1 Calculating… Estimated API cost

Cheaper for this workload Calculating… Difference: calculating…

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

Verdict

Perceptron Mk1 has the lower input price; Perceptron Mk1 has the lower output price; GPT-5.5 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 $20 for GPT-5.5 and $0.9 for Perceptron Mk1.

Best Fit

Choose GPT-5.5 when you care most about larger context window.

Choose Perceptron Mk1 when you care most about lower input-token price, and lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Perceptron Mk1 is estimated at $0.9 vs $20 for GPT-5.5, saving $19.1 (95.5% lower).
Perceptron Mk1 is $19.1 cheaper on the standard workload (95.5% lower).
Perceptron Mk1 is $4.85 cheaper per 1M input tokens (97% lower; 33.3x difference).
Perceptron Mk1 is $28.5 cheaper per 1M output tokens (95% lower; 20x difference).
GPT-5.5 has 1.02M more context (32x larger).

Head-to-Head Specs

Feature	🔥GPT-5.5 (OpenAI)	NewPerceptron Mk1 (Perceptron)
Input Price prompt tokens per 1M	$5	$0.15
Completion Price per 1M tokens	$30	$1.5
Sample Workload Cost 1M input + 500K output	$20	$0.9
Context Window	1.05M	32.77K
Release Date	2026-04-24	2026-05-12
Popularity	#17

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 $20 for GPT-5.5, saving $19.1 (95.5% 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-5.5	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

gpt-oss-120b (free) can replace GPT-5.5 when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace GPT-5.5 when lower sample workload cost matters most: $0.
gpt-oss-20b can replace GPT-5.5 when lower sample workload cost matters most: $0.1.
gpt-oss-120b can replace GPT-5.5 when lower sample workload cost matters most: $0.13.

Larger context near this budget

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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OpenAI catalog

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Perceptron catalog

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GPT-5.5

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...

Perceptron Mk1

Perceptron Mk1 (Mark One) is Perceptron's highest-quality vision-language model for video and embodied reasoning.** It accepts image and video inputs paired with natural language queries, and produces detailed visual understanding...