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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. Universal-3.5 ProAssemblyAIRemove
  2. GPT-6 AstraOpenAIRemove
  3. S1Fish AudioRemove
  4. Gemini 3.5 TranscribeGoogleRemove

4 is the maximum. Remove one to add another.

universal-3-5-pro vs gpt-6-astra vs s1 vs gemini-3.5-transcribe
AttributeUniversal-3.5 Prouniversal-3-5-proGPT-6 Astragpt-6-astraS1s1Gemini 3.5 Transcribegemini-3.5-transcribe
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/A98.3K
Max outputN/AN/AN/AN/A
Capabilities
VisionNoYesNoYes
Function CallingNoYesNoYes
JSON ModeNoYesNoNo
StreamingNoYesNoNo
Catalogue
ProviderAssemblyAIOpenAIFish AudioGoogle
Categoryvoicechatvoicevoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-09-22—2026-07-292026-09-25
Description
SummaryAssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.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.Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.