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.

Claude Sonnet 5.5Anthropic Remove
S2 ProFish Audio Remove
Transcribe 1 ProFish Audio Remove
GPT-6 AstraOpenAI Remove

4 is the maximum. Remove one to add another.

claude-sonnet-5.5 vs s2-pro vs transcribe-1-pro vs gpt-6-astra
Attribute	Claude Sonnet 5.5claude-sonnet-5.5	S2 Pros2-pro	Transcribe 1 Protranscribe-1-pro	GPT-6 Astragpt-6-astra
Pricing
Input	$2.00 / 1M	$0 / 1M	$0 / 1M	$10.00 / 1M
Output	$10.00 / 1M	$0 / 1M	$0 / 1M	$50.00 / 1M
Cache Write (5m)	$2.50 / 1M	Not applicable	Not applicable	$10.00 / 1M
Cache Write (1h)	$4.00 / 1M	Not applicable	Not applicable	$10.00 / 1M
Cache Read	$0.20 / 1M	Not applicable	Not applicable	$10.00 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	N/A	N/A	1M
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	No	No	Yes
Function Calling	Yes	No	No	Yes
JSON Mode	Yes	No	No	Yes
Streaming	Yes	No	No	Yes
Catalogue
Provider	Anthropic	Fish Audio	Fish Audio	OpenAI
Category	chat	voice	voice	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	2026-07-29	2026-09-24	—
Description
Summary	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.	Fish Audio S2 Pro 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.