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.

S1Fish Audio Remove
Transcribe 1 ProFish Audio Remove
GPT-6 AstraOpenAI Remove
Perceptron Mk1.5Perceptron Remove

4 is the maximum. Remove one to add another.

s1 vs transcribe-1-pro vs gpt-6-astra vs perceptron-mk1.5
Attribute	S1s1	Transcribe 1 Protranscribe-1-pro	GPT-6 Astragpt-6-astra	Perceptron Mk1.5perceptron-mk1.5
Pricing
Input	$0 / 1M	$0 / 1M	$10.00 / 1M	$0.15 / 1M
Output	$0 / 1M	$0 / 1M	$50.00 / 1M	$1.50 / 1M
Cache Write (5m)	Not applicable	Not applicable	$10.00 / 1M	$0.15 / 1M
Cache Write (1h)	Not applicable	Not applicable	$10.00 / 1M	$0.15 / 1M
Cache Read	Not applicable	Not applicable	$10.00 / 1M	$0.15 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	N/A	N/A	1M	36.9K
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	No	No	Yes	No
Function Calling	No	No	Yes	No
JSON Mode	No	No	Yes	No
Streaming	No	No	Yes	Yes
Catalogue
Provider	Fish Audio	Fish Audio	OpenAI	Perceptron
Category	voice	voice	chat	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	2026-07-29	2026-09-24	—	2026-09-25
Description
Summary	Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.	Fish Audio Transcribe 1 Pro speech-to-text with speaker labels; transcripts include speaker tags such as <\|speaker:0\|>. Billed per second of audio.	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.