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 SolOpenAI Remove
Gemini 3.5 TranscribeGoogle Remove
Aura-2Deepgram Remove
Grok STT 1.0xAI Remove

4 is the maximum. Remove one to add another.

gpt-6-sol vs gemini-3.5-transcribe vs aura-2 vs grok-stt-1.0
Attribute	GPT-6 Solgpt-6-sol	Gemini 3.5 Transcribegemini-3.5-transcribe	Aura-2aura-2	Grok STT 1.0grok-stt-1.0
Pricing
Input	$2.00 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Output	$10.00 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Cache Write (5m)	$2.00 / 1M	Not applicable	Not applicable	Not applicable
Cache Write (1h)	$2.00 / 1M	Not applicable	Not applicable	Not applicable
Cache Read	$2.00 / 1M	Not applicable	Not applicable	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1.1M	98.3K	N/A	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	Yes	No	No
Function Calling	Yes	Yes	No	No
JSON Mode	Yes	No	No	No
Streaming	Yes	No	No	No
Catalogue
Provider	OpenAI	Google	Deepgram	xAI
Category	chat	voice	voice	voice
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	2026-09-25	2026-07-16	2026-07-23
Description
Summary	GPT-6 Sol is OpenAI's cost-efficient high-end model in the GPT-6 series, positioned between the flagship GPT-6 Astra and the fast GPT-6 Luna tier. It is designed for professional knowledge work, agentic coding, business workflow automation, and computer-use tasks, with particular strength in long-horizon software engineering across real-world codebases. GPT-6 Sol approaches Astra-level factual reliability at a significantly lower cost, while sharing its clear and concise communication style. This balance of capability, reliability, and efficiency makes it well suited for production agents, complex engineering workflows, and scalable professional applications	Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.	Deepgram Aura-2 text-to-speech for real-time voice applications. Billed per input character.	xAI Grok STT 1.0 speech-to-text. Billed per second of audio.