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.

Universal-3.5 ProAssemblyAI Remove
S2 ProFish Audio Remove
Claude Sonnet 5.5Anthropic Remove
Grok 4.7SpaceXAI Remove

4 is the maximum. Remove one to add another.

universal-3-5-pro vs s2-pro vs claude-sonnet-5.5 vs grok-4.7
Attribute	Universal-3.5 Prouniversal-3-5-pro	S2 Pros2-pro	Claude Sonnet 5.5claude-sonnet-5.5	Grok 4.7grok-4.7
Pricing
Input	$0 / 1M	$0 / 1M	$2.00 / 1M	$1.60 / 1M
Output	$0 / 1M	$0 / 1M	$10.00 / 1M	$4.80 / 1M
Cache Write (5m)	Not applicable	Not applicable	$2.50 / 1M	$1.60 / 1M
Cache Write (1h)	Not applicable	Not applicable	$4.00 / 1M	$1.60 / 1M
Cache Read	Not applicable	Not applicable	$0.20 / 1M	$1.60 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	N/A	N/A	1M	500K
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	No	No	Yes	Yes
Function Calling	No	No	Yes	Yes
JSON Mode	No	No	Yes	Yes
Streaming	No	No	Yes	Yes
Catalogue
Provider	AssemblyAI	Fish Audio	Anthropic	SpaceXAI
Category	voice	voice	chat	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	2026-09-22	2026-07-29	—	—
Description
Summary	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.	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.	Grok 4.7 is SpaceXAI's flagship model for coding, agentic workflows, and professional knowledge work, succeeding Grok 4.6. It is particularly strong at long-running software engineering, self-verification, and long-context execution, while improving capabilities in document drafting, presentations, and other professional tasks. Trained with extended reinforcement learning focused on multi-hour problems, Grok 4.7 is optimized for sustained, complex task execution and natively supports the Grok Bot harness for conversational workflows. It also introduces an enhanced safeguard stack designed to combine strong jailbreak resistance with low refusal rates for legitimate technical work. Reported benchmark results use xhigh reasoning effort.