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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.

  1. S1Fish AudioRemove
  2. GPT-6 AstraOpenAIRemove
  3. MAI-Transcribe 2MicrosoftRemove
  4. Universal-3.5 ProAssemblyAIRemove

4 is the maximum. Remove one to add another.

s1 vs gpt-6-astra vs mai-transcribe-2 vs universal-3-5-pro
AttributeS1s1GPT-6 Astragpt-6-astraMAI-Transcribe 2mai-transcribe-2Universal-3.5 Prouniversal-3-5-pro
Pricing
Input$0 / 1M$10.00 / 1M$0 / 1M$0 / 1M
Output$0 / 1M$50.00 / 1M$0 / 1M$0 / 1M
Cache Write (5m)Not applicable$10.00 / 1MNot applicableNot applicable
Cache Write (1h)Not applicable$10.00 / 1MNot applicableNot applicable
Cache ReadNot applicable$10.00 / 1MNot applicableNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A1MN/AN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoYesNoNo
Function CallingNoYesNoNo
JSON ModeNoYesNoNo
StreamingNoYesNoNo
Catalogue
ProviderFish AudioOpenAIMicrosoftAssemblyAI
Categoryvoicechatvoicevoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-29—2026-09-032026-09-22
Description
SummaryFish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.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.AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.