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perceptron-mk1.5 vs gpt-6-astra vs universal-3-5-pro vs s2-pro
Attribute	Perceptron Mk1.5perceptron-mk1.5	GPT-6 Astragpt-6-astra	Universal-3.5 Prouniversal-3-5-pro	S2 Pros2-pro
Pricing
Input	$0.15 / 1M	$10.00 / 1M	$0 / 1M	$0 / 1M
Output	$1.50 / 1M	$50.00 / 1M	$0 / 1M	$0 / 1M
Cache Write (5m)	$0.15 / 1M	$10.00 / 1M	Not applicable	Not applicable
Cache Write (1h)	$0.15 / 1M	$10.00 / 1M	Not applicable	Not applicable
Cache Read	$0.15 / 1M	$10.00 / 1M	Not applicable	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	36.9K	1M	N/A	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	No	Yes	No	No
Function Calling	No	Yes	No	No
JSON Mode	No	Yes	No	No
Streaming	Yes	Yes	No	No
Catalogue
Provider	Perceptron	OpenAI	AssemblyAI	Fish Audio
Category	chat	chat	voice	voice
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	2026-09-25	—	2026-09-22	2026-07-29
Description
Summary	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.	GPT-6 Astra is OpenAI's flagship model for demanding end-to-end professional work, designed for advanced analysis, software engineering, deep research, scientific tasks, and document creation. It is particularly strong in long-horizon agentic workflows, including tasks that require sustained reasoning, tool orchestration, and computer and browser use, making it well suited for complex autonomous workflows and production-grade knowledge work.	AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.	Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.