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-5.6 TerraOpenAI Remove
Perceptron Mk1.5Perceptron Remove
Gemini 3.5 TranscribeGoogle Remove
Claude Sonnet 5.5Anthropic Remove

4 is the maximum. Remove one to add another.

gpt-5.6-terra vs perceptron-mk1.5 vs gemini-3.5-transcribe vs claude-sonnet-5.5
Attribute	GPT-5.6 Terragpt-5.6-terra	Perceptron Mk1.5perceptron-mk1.5	Gemini 3.5 Transcribegemini-3.5-transcribe	Claude Sonnet 5.5claude-sonnet-5.5
Pricing
Input	$2.00 / 1M	$0.15 / 1M	— Not priced per input token	$2.00 / 1M
Output	$12.00 / 1M	$1.50 / 1M	— Not priced per output token	$10.00 / 1M
Cache Write (5m)	$2.00 / 1M	$0.15 / 1M	Not applicable	$2.50 / 1M
Cache Write (1h)	$2.00 / 1M	$0.15 / 1M	Not applicable	$4.00 / 1M
Cache Read	$2.00 / 1M	$0.15 / 1M	Not applicable	$0.20 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	36.9K	98.3K	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	No	Yes
Streaming	Yes	Yes	No	Yes
Catalogue
Provider	OpenAI	Perceptron	Google	Anthropic
Category	chat	chat	voice	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	2026-09-25	2026-09-25	—
Description
Summary	GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is designed for everyday coding, reasoning, and agentic workflows, delivering strong performance while balancing capability and cost. Offering near-flagship quality at approximately half the cost of Sol, GPT-5.6 Terra is well suited for production applications that require reliable reasoning, software development, and scalable agent execution.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.	Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output 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.