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
Claude Opus 5.5Anthropic Remove
Perceptron Mk1.5Perceptron Remove
Muse Spark 1.3Meta Remove

4 is the maximum. Remove one to add another.

claude-sonnet-5.5 vs claude-opus-5.5 vs perceptron-mk1.5 vs muse-spark-1.3
Attribute	Claude Sonnet 5.5claude-sonnet-5.5	Claude Opus 5.5claude-opus-5.5	Perceptron Mk1.5perceptron-mk1.5	Muse Spark 1.3muse-spark-1.3
Pricing
Input	$2.00 / 1M	$4.00 / 1M	$0.15 / 1M	$1.25 / 1M
Output	$10.00 / 1M	$20.00 / 1M	$1.50 / 1M	$4.25 / 1M
Cache Write (5m)	$2.50 / 1M	$5.00 / 1M	$0.15 / 1M	$1.25 / 1M
Cache Write (1h)	$4.00 / 1M	$8.00 / 1M	$0.15 / 1M	$1.25 / 1M
Cache Read	$0.20 / 1M	$0.40 / 1M	$0.15 / 1M	$1.25 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	1M	36.9K	1M
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	Yes	No	Yes
Function Calling	Yes	Yes	No	Yes
JSON Mode	Yes	Yes	No	Yes
Streaming	Yes	Yes	Yes	Yes
Catalogue
Provider	Anthropic	Anthropic	Perceptron	Meta
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.	Claude Opus 5.5 is Anthropic's flagship model for advanced reasoning, coding, and long-horizon agentic workflows, succeeding Opus 5. It excels at multi-step changes across large codebases, code review and bug detection, financial and scientific analysis, and understanding dense charts, diagrams, and screenshots, with stronger grounding when reporting figures and citing sources. Compared with Opus 5, it completes comparable tasks with fewer steps and lower token usage while providing clearer, more concise progress reporting. With adaptive thinking and configurable effort levels, Opus 5.5 can balance reasoning depth, latency, and cost, making it well suited for both demanding autonomous workflows and latency-sensitive professional tasks.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.	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.