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
Muse Spark 1.3Meta Remove
GPT-6 LunaOpenAI Remove
Perceptron Mk1.5Perceptron Remove

4 is the maximum. Remove one to add another.

claude-sonnet-5.5 vs muse-spark-1.3 vs gpt-6-luna vs perceptron-mk1.5
Attribute	Claude Sonnet 5.5claude-sonnet-5.5	Muse Spark 1.3muse-spark-1.3	GPT-6 Lunagpt-6-luna	Perceptron Mk1.5perceptron-mk1.5
Pricing
Input	$2.00 / 1M	$1.25 / 1M	$0.10 / 1M	$0.15 / 1M
Output	$10.00 / 1M	$4.25 / 1M	$0.50 / 1M	$1.50 / 1M
Cache Write (5m)	$2.50 / 1M	$1.25 / 1M	$0.10 / 1M	$0.15 / 1M
Cache Write (1h)	$4.00 / 1M	$1.25 / 1M	$0.10 / 1M	$0.15 / 1M
Cache Read	$0.20 / 1M	$1.25 / 1M	$0.10 / 1M	$0.15 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	1M	1.1M	36.9K
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	Yes	Yes	No
Function Calling	Yes	Yes	Yes	No
JSON Mode	Yes	Yes	Yes	No
Streaming	Yes	Yes	Yes	Yes
Catalogue
Provider	Anthropic	Meta	OpenAI	Perceptron
Category	chat	chat	chat	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	—	—	2026-09-25
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.	Muse Spark 1.3 is Meta's multimodal reasoning model designed for long-running agentic, multi-agent, and coding workflows. It maintains context and information across extended tasks, enabling reliable execution in complex, multi-step environments. The model is optimized to resolve conflicting information, seek clarification or confirmation when necessary, and execute concisely, making it well suited for autonomous agents, collaborative multi-agent systems, and long-horizon software engineering workflows.	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.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.