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.

s2.1-pro vs claude-sonnet-5.5 vs nova-3 vs perceptron-mk1.5
Attribute	S2.1 Pros2.1-pro	Claude Sonnet 5.5claude-sonnet-5.5	Nova-3nova-3	Perceptron Mk1.5perceptron-mk1.5
Pricing
Input	$0 / 1M	$2.00 / 1M	$0 / 1M	$0.15 / 1M
Output	$0 / 1M	$10.00 / 1M	$0 / 1M	$1.50 / 1M
Cache Write (5m)	Not applicable	$2.50 / 1M	Not applicable	$0.15 / 1M
Cache Write (1h)	Not applicable	$4.00 / 1M	Not applicable	$0.15 / 1M
Cache Read	Not applicable	$0.20 / 1M	Not applicable	$0.15 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	N/A	1M	N/A	36.9K
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	No	Yes	No	Yes
Catalogue
Provider	Fish Audio	Anthropic	Deepgram	Perceptron
Category	voice	chat	voice	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	2026-07-29	—	2026-07-15	2026-09-25
Description
Summary	Fish Audio S2.1 Pro text-to-speech. Billed per UTF-8 byte of input text.	Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, serving as a direct upgrade to Sonnet 5. It excels at feature development, bug fixing, and creating polished documents, presentations, and spreadsheets, while offering clearer writing and communication than its predecessor.	Deepgram Nova-3 speech-to-text. Billed per second of audio.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.