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.

S2 ProFish Audio Remove
DeepSeek V4.1 FlashDeepSeek Remove
Claude Sonnet 5.5Anthropic Remove
S1Fish Audio Remove

4 is the maximum. Remove one to add another.

s2-pro vs deepseek-v4.1-flash vs claude-sonnet-5.5 vs s1
Attribute	S2 Pros2-pro	DeepSeek V4.1 Flashdeepseek-v4.1-flash	Claude Sonnet 5.5claude-sonnet-5.5	S1s1
Pricing
Input	$0 / 1M	$0.30 / 1M	$2.00 / 1M	$0 / 1M
Output	$0 / 1M	$1.20 / 1M	$10.00 / 1M	$0 / 1M
Cache Write (5m)	Not applicable	$0.30 / 1M	$2.50 / 1M	Not applicable
Cache Write (1h)	Not applicable	$0.30 / 1M	$4.00 / 1M	Not applicable
Cache Read	Not applicable	$0.30 / 1M	$0.20 / 1M	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	N/A	1M	1M	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	No	Yes	Yes	No
Function Calling	No	Yes	Yes	No
JSON Mode	No	Yes	Yes	No
Streaming	No	Yes	Yes	No
Catalogue
Provider	Fish Audio	DeepSeek	Anthropic	Fish Audio
Category	voice	chat	chat	voice
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	2026-07-29	—	—	2026-07-29
Description
Summary	Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.	DeepSeek V4.1 Flash is a cost-efficient sparse Mixture-of-Experts (MoE) model in DeepSeek's V4.1 family, optimized for coding, reasoning, and agentic workflows. Despite its efficiency-focused positioning, DeepSeek reports that it surpasses the previous V4 Pro in performance, inference speed, and overall task completion time. The model is particularly strong at long-horizon, multi-step execution, making it well suited for coding agents, complex problem solving, and autonomous workflows that must reliably carry tasks through to completion.	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 S1 text-to-speech. Billed per UTF-8 byte of input text.