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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. Gemini 3.5 TranscribeGoogleRemove
  2. S2 ProFish AudioRemove
  3. GPT-6 Astra ProOpenAIRemove
  4. S1Fish AudioRemove

4 is the maximum. Remove one to add another.

gemini-3.5-transcribe vs s2-pro vs gpt-6-astra-pro vs s1
AttributeGemini 3.5 Transcribegemini-3.5-transcribeS2 Pros2-proGPT-6 Astra Progpt-6-astra-proS1s1
Pricing
Input$0 / 1M$0 / 1M$10.00 / 1M$0 / 1M
Output$0 / 1M$0 / 1M$50.00 / 1M$0 / 1M
Cache Write (5m)Not applicableNot applicable$10.00 / 1MNot applicable
Cache Write (1h)Not applicableNot applicable$10.00 / 1MNot applicable
Cache ReadNot applicableNot applicable$10.00 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max context98.3KN/A1MN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionYesNoYesNo
Function CallingYesNoYesNo
JSON ModeNoNoYesNo
StreamingNoNoYesNo
Catalogue
ProviderGoogleFish AudioOpenAIFish Audio
Categoryvoicevoicechatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-09-252026-07-29—2026-07-29
Description
SummaryGoogle Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.GPT-6 Astra Pro uses the same underlying model as GPT-6 Astra, but runs with reasoning.mode set to pro for higher-quality responses on complex tasks. Optimized for deeper reasoning, greater accuracy, and more reliable multi-step execution, it is well suited for demanding coding, analysis, and agentic workflows where solution quality takes priority over speed and cost.Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.