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.

S1Fish Audio Remove
GPT-6 Sol ProOpenAI Remove
GPT-6 AstraOpenAI Remove
MAI-Transcribe 2Microsoft Remove

4 is the maximum. Remove one to add another.

s1 vs gpt-6-sol-pro vs gpt-6-astra vs mai-transcribe-2
Attribute	S1s1	GPT-6 Sol Progpt-6-sol-pro	GPT-6 Astragpt-6-astra	MAI-Transcribe 2mai-transcribe-2
Pricing
Input	$0 / 1M	$2.00 / 1M	$10.00 / 1M	$0 / 1M
Output	$0 / 1M	$10.00 / 1M	$50.00 / 1M	$0 / 1M
Cache Write (5m)	Not applicable	$2.00 / 1M	$10.00 / 1M	Not applicable
Cache Write (1h)	Not applicable	$2.00 / 1M	$10.00 / 1M	Not applicable
Cache Read	Not applicable	$2.00 / 1M	$10.00 / 1M	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	N/A	1.1M	1M	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	No	Yes	Yes	No
Function Calling	No	Yes	Yes	No
JSON Mode	No	Yes	Yes	No
Streaming	No	Yes	Yes	No
Catalogue
Provider	Fish Audio	OpenAI	OpenAI	Microsoft
Category	voice	chat	chat	voice
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	2026-07-29	—	—	2026-09-03
Description
Summary	Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.	GPT-6 Sol Pro uses the same underlying model as GPT-6 Sol, but runs with reasoning.mode set to pro for higher-quality responses on complex and demanding tasks. Optimized for deeper reasoning, greater accuracy, and more reliable multi-step execution, it is particularly well suited for agentic coding, long-horizon software engineering, professional analysis, and complex automated workflows where solution quality takes priority over latency and cost.	GPT-6 Astra is OpenAI's flagship model for demanding end-to-end professional work, designed for advanced analysis, software engineering, deep research, scientific tasks, and document creation. It is particularly strong in long-horizon agentic workflows, including tasks that require sustained reasoning, tool orchestration, and computer and browser use, making it well suited for complex autonomous workflows and production-grade knowledge work.	Microsoft MAI-Transcribe-2 speech-to-text. Billed per second of audio.