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 LunaOpenAI Remove
Perceptron Mk1.5Perceptron Remove
Mistral Small 4Mistral AI Remove
Claude Sonnet 5.5Anthropic Remove

4 is the maximum. Remove one to add another.

gpt-6-luna vs perceptron-mk1.5 vs mistral-small-2603 vs claude-sonnet-5.5
Attribute	GPT-6 Lunagpt-6-luna	Perceptron Mk1.5perceptron-mk1.5	Mistral Small 4mistral-small-2603	Claude Sonnet 5.5claude-sonnet-5.5
Pricing
Input	$0.10 / 1M	$0.15 / 1M	$0.15 / 1M	$2.00 / 1M
Output	$0.50 / 1M	$1.50 / 1M	$0.60 / 1M	$10.00 / 1M
Cache Write (5m)	$0.10 / 1M	$0.15 / 1M	$0.15 / 1M	$2.50 / 1M
Cache Write (1h)	$0.10 / 1M	$0.15 / 1M	$0.15 / 1M	$4.00 / 1M
Cache Read	$0.10 / 1M	$0.15 / 1M	$0.15 / 1M	$0.20 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1.1M	36.9K	262.1K	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	Mistral AI	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 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.	Mistral Small 4 is the latest release in the Mistral Small family, unifying capabilities from multiple flagship models into a single system. It integrates strong reasoning (Magistral), multimodal understanding (Pixtral), and agentic coding capabilities (Devstral), enabling a versatile, all-in-one model. Designed to handle complex analysis, software development, and visual tasks within the same workflow, Mistral Small 4 is well suited for integrated agentic applications and end-to-end problem solving across domains.	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.