Compare models

Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.

4 is the maximum. Remove one to add another.

gpt-6-astra vs perceptron-mk1.5 vs gemini-3.5-transcribe vs s2-pro
Attribute	GPT-6 Astragpt-6-astra	Perceptron Mk1.5perceptron-mk1.5	Gemini 3.5 Transcribegemini-3.5-transcribe	S2 Pros2-pro
Pricing
Input	$10.00 / 1M	$0.15 / 1M	$0 / 1M	$0 / 1M
Output	$50.00 / 1M	$1.50 / 1M	$0 / 1M	$0 / 1M
Cache Write (5m)	$10.00 / 1M	$0.15 / 1M	Not applicable	Not applicable
Cache Write (1h)	$10.00 / 1M	$0.15 / 1M	Not applicable	Not applicable
Cache Read	$10.00 / 1M	$0.15 / 1M	Not applicable	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	36.9K	98.3K	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	No	Yes	No
Function Calling	Yes	No	Yes	No
JSON Mode	Yes	No	No	No
Streaming	Yes	Yes	No	No
Catalogue
Provider	OpenAI	Perceptron	Google	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	2026-09-25	2026-07-29
Description
Summary	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.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.	Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.	Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.