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
Transcribe 1 ProFish Audio Remove
Perceptron Mk1.5Perceptron Remove
GPT-6.1 SolOpenAI Remove

4 is the maximum. Remove one to add another.

gpt-5.6-terra vs transcribe-1-pro vs perceptron-mk1.5 vs gpt-6.1-sol
Attribute	GPT-5.6 Terragpt-5.6-terra	Transcribe 1 Protranscribe-1-pro	Perceptron Mk1.5perceptron-mk1.5	GPT-6.1 Solgpt-6.1-sol
Pricing
Input	$2.00 / 1M	— Not priced per input token	$0.15 / 1M	$2.00 / 1M
Output	$12.00 / 1M	— Not priced per output token	$1.50 / 1M	$10.00 / 1M
Cache Write (5m)	$2.00 / 1M	Not applicable	$0.15 / 1M	$2.00 / 1M
Cache Write (1h)	$2.00 / 1M	Not applicable	$0.15 / 1M	$2.00 / 1M
Cache Read	$2.00 / 1M	Not applicable	$0.15 / 1M	$2.00 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	N/A	36.9K	1M
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	No	No	Yes
Function Calling	Yes	No	No	Yes
JSON Mode	Yes	No	No	Yes
Streaming	Yes	No	Yes	Yes
Catalogue
Provider	OpenAI	Fish Audio	Perceptron	OpenAI
Category	chat	voice	chat	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	2026-09-24	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.	Fish Audio Transcribe 1 Pro speech-to-text with speaker labels; transcripts include speaker tags such as <\|speaker:0\|>. Billed per second of audio.	Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.	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.