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

4 is the maximum. Remove one to add another.

gpt-5.6-terra vs claude-sonnet-5.5 vs gemini-3.5-transcribe vs perceptron-mk1.5
Attribute	GPT-5.6 Terragpt-5.6-terra	Claude Sonnet 5.5claude-sonnet-5.5	Gemini 3.5 Transcribegemini-3.5-transcribe	Perceptron Mk1.5perceptron-mk1.5
Pricing
Input	$2.00 / 1M	$2.00 / 1M	— Not priced per input token	$0.15 / 1M
Output	$12.00 / 1M	$10.00 / 1M	— Not priced per output token	$1.50 / 1M
Cache Write (5m)	$2.00 / 1M	$2.50 / 1M	Not applicable	$0.15 / 1M
Cache Write (1h)	$2.00 / 1M	$4.00 / 1M	Not applicable	$0.15 / 1M
Cache Read	$2.00 / 1M	$0.20 / 1M	Not applicable	$0.15 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	1M	98.3K	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	No	No
Streaming	Yes	Yes	No	Yes
Catalogue
Provider	OpenAI	Anthropic	Google	Perceptron
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.	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.	Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.