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.

DeepSeek V4.1 FlashDeepSeek Remove
Claude Sonnet 5.5Anthropic Remove
S1Fish Audio Remove
Perceptron Mk1.5Perceptron Remove

4 is the maximum. Remove one to add another.

deepseek-v4.1-flash vs claude-sonnet-5.5 vs s1 vs perceptron-mk1.5
Attribute	DeepSeek V4.1 Flashdeepseek-v4.1-flash	Claude Sonnet 5.5claude-sonnet-5.5	S1s1	Perceptron Mk1.5perceptron-mk1.5
Pricing
Input	$0.30 / 1M	$2.00 / 1M	$0 / 1M	$0.15 / 1M
Output	$1.20 / 1M	$10.00 / 1M	$0 / 1M	$1.50 / 1M
Cache Write (5m)	$0.30 / 1M	$2.50 / 1M	Not applicable	$0.15 / 1M
Cache Write (1h)	$0.30 / 1M	$4.00 / 1M	Not applicable	$0.15 / 1M
Cache Read	$0.30 / 1M	$0.20 / 1M	Not applicable	$0.15 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	1M	N/A	36.9K
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	Yes	No	No
Function Calling	Yes	Yes	No	No
JSON Mode	Yes	Yes	No	No
Streaming	Yes	Yes	No	Yes
Catalogue
Provider	DeepSeek	Anthropic	Fish Audio	Perceptron
Category	chat	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	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.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.