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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. GPT-6 Sol ProOpenAIRemove
  2. S2.1 ProFish AudioRemove
  3. S1Fish AudioRemove
  4. Gemini 3.5 TranscribeGoogleRemove

4 is the maximum. Remove one to add another.

gpt-6-sol-pro vs s2.1-pro vs s1 vs gemini-3.5-transcribe
AttributeGPT-6 Sol Progpt-6-sol-proS2.1 Pros2.1-proS1s1Gemini 3.5 Transcribegemini-3.5-transcribe
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 / 1MNot applicableNot applicableNot applicable
Cache Write (1h)$2.00 / 1MNot applicableNot applicableNot applicable
Cache Read$2.00 / 1MNot applicableNot applicableNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max context1.1MN/AN/A98.3K
Max outputN/AN/AN/AN/A
Capabilities
VisionYesNoNoYes
Function CallingYesNoNoYes
JSON ModeYesNoNoNo
StreamingYesNoNoNo
Catalogue
ProviderOpenAIFish AudioFish AudioGoogle
Categorychatvoicevoicevoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released—2026-07-292026-07-292026-09-25
Description
SummaryGPT-6 Sol Pro uses the same underlying model as GPT-6 Sol, but runs with reasoning.mode set to pro for higher-quality responses on complex and demanding tasks. Optimized for deeper reasoning, greater accuracy, and more reliable multi-step execution, it is particularly well suited for agentic coding, long-horizon software engineering, professional analysis, and complex automated workflows where solution quality takes priority over latency and cost.Fish Audio S2.1 Pro text-to-speech. Billed per UTF-8 byte of input text.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.