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.

GPT-6.1 SolOpenAI Remove
Perceptron Mk1.5Perceptron Remove
Claude Sonnet 5.5Anthropic Remove
Claude Opus 5.5Anthropic Remove

4 is the maximum. Remove one to add another.

gpt-6.1-sol vs perceptron-mk1.5 vs claude-sonnet-5.5 vs claude-opus-5.5
Attribute	GPT-6.1 Solgpt-6.1-sol	Perceptron Mk1.5perceptron-mk1.5	Claude Sonnet 5.5claude-sonnet-5.5	Claude Opus 5.5claude-opus-5.5
Pricing
Input	$2.00 / 1M	$0.15 / 1M	$2.00 / 1M	$4.00 / 1M
Output	$10.00 / 1M	$1.50 / 1M	$10.00 / 1M	$20.00 / 1M
Cache Write (5m)	$2.00 / 1M	$0.15 / 1M	$2.50 / 1M	$5.00 / 1M
Cache Write (1h)	$2.00 / 1M	$0.15 / 1M	$4.00 / 1M	$8.00 / 1M
Cache Read	$2.00 / 1M	$0.15 / 1M	$0.20 / 1M	$0.40 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	36.9K	1M	1M
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	No	Yes	Yes
Function Calling	Yes	No	Yes	Yes
JSON Mode	Yes	No	Yes	Yes
Streaming	Yes	Yes	Yes	Yes
Catalogue
Provider	OpenAI	Perceptron	Anthropic	Anthropic
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	GPT-6.1 Sol is an upgraded high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra. It is optimized for agentic coding, computer use, document-heavy professional work, and multi-step business automation, delivering near-Astra-level capability at significantly lower cost. Compared with GPT-6 Sol, it offers improved factual reliability and stronger adherence to explicit constraints and user intent, making it well suited for complex, long-running agentic workflows where accurate and dependable execution is critical.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.	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.