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
Claude Sonnet 5.5Anthropic Remove
Gemini 3.5 TranscribeGoogle Remove
GPT-6 LunaOpenAI Remove

4 is the maximum. Remove one to add another.

s1 vs claude-sonnet-5.5 vs gemini-3.5-transcribe vs gpt-6-luna
Attribute	S1s1	Claude Sonnet 5.5claude-sonnet-5.5	Gemini 3.5 Transcribegemini-3.5-transcribe	GPT-6 Lunagpt-6-luna
Pricing
Input	$0 / 1M	$2.00 / 1M	$0 / 1M	$0.10 / 1M
Output	$0 / 1M	$10.00 / 1M	$0 / 1M	$0.50 / 1M
Cache Write (5m)	Not applicable	$2.50 / 1M	Not applicable	$0.10 / 1M
Cache Write (1h)	Not applicable	$4.00 / 1M	Not applicable	$0.10 / 1M
Cache Read	Not applicable	$0.20 / 1M	Not applicable	$0.10 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	N/A	1M	98.3K	1.1M
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	No	Yes	Yes	Yes
Function Calling	No	Yes	Yes	Yes
JSON Mode	No	Yes	No	Yes
Streaming	No	Yes	No	Yes
Catalogue
Provider	Fish Audio	Anthropic	Google	OpenAI
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	—	2026-09-25	—
Description
Summary	Fish Audio S1 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.	Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.	GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, optimized for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic tasks. It combines low-cost, responsive inference with the GPT-6 family’s improvements in factual reliability and clear, concise communication. At higher reasoning effort, GPT-6 Luna can also handle complex software engineering and computer-use workflows that previously required a Sol-tier model, making it a versatile choice for scalable production applications that need to balance speed, cost, and capability.