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Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.

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gpt-6-luna-pro vs s2-pro vs aura-2 vs transcribe-1-pro
Attribute	GPT-6 Luna Progpt-6-luna-pro	S2 Pros2-pro	Aura-2aura-2	Transcribe 1 Protranscribe-1-pro
Pricing
Input	$0.10 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Output	$0.50 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Cache Write (5m)	$0.10 / 1M	Not applicable	Not applicable	Not applicable
Cache Write (1h)	$0.10 / 1M	Not applicable	Not applicable	Not applicable
Cache Read	$0.10 / 1M	Not applicable	Not applicable	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1.1M	N/A	N/A	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	No	No	No
Function Calling	Yes	No	No	No
JSON Mode	Yes	No	No	No
Streaming	Yes	No	No	No
Catalogue
Provider	OpenAI	Fish Audio	Deepgram	Fish Audio
Category	chat	voice	voice	voice
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	2026-07-29	2026-07-16	2026-09-24
Description
Summary	GPT-6 Luna Pro uses the same underlying model as GPT-6 Luna, but runs with reasoning.mode set to pro for higher-quality responses on complex tasks. It combines Luna's speed and cost efficiency with deeper reasoning and more reliable multi-step execution, making it well suited for advanced coding, computer use, and agentic workflows where higher solution quality is needed without moving to a larger GPT-6 tier.	Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.	Deepgram Aura-2 text-to-speech for real-time voice applications. Billed per input character.	Fish Audio Transcribe 1 Pro speech-to-text with speaker labels; transcripts include speaker tags such as <\|speaker:0\|>. Billed per second of audio.