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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.

  1. GPT-6.1 TerraOpenAIRemove
  2. Gemini 3.1 Flash TTS PreviewGoogleRemove
gpt-6.1-terra vs gemini-3.1-flash-tts-preview
AttributeGPT-6.1 Terragpt-6.1-terraGemini 3.1 Flash TTS Previewgemini-3.1-flash-tts-preview
Pricing
Input$1.00 / 1M$27.50 / 1M
Output$5.00 / 1M— Not priced per output token
Cache Write (5m)$1.00 / 1MNot applicable
Cache Write (1h)$1.00 / 1MNot applicable
Cache Read$1.00 / 1MNot applicable
Web Search$0 / 1M$0 / 1M
Context
Max context1M8.2K
Max outputN/AN/A
Capabilities
VisionYesNo
Function CallingYesNo
JSON ModeYesYes
StreamingNoNo
Catalogue
ProviderOpenAIGoogle
Categorychatvoice
Charge typePay As You GoPay As You Go
Released——
Description
SummaryGPT-6.1 Terra is OpenAI’s mid-tier model in the GPT-6.1 series, designed to balance capability, speed, and cost efficiency. Positioned below GPT-6.1 Sol, it delivers strong performance across everyday agentic workflows, coding, and professional writing, with particular strengths in screenshot understanding and on-screen content analysis. Optimized for high-volume production workloads, GPT-6.1 Terra is well suited for coding assistants, visual interface analysis, workflow automation, and scalable agentic applications that require reliable performance at an accessible cost.Gemini 3.1 Flash TTS Preview is Google's next-generation text-to-speech model, delivering a major upgrade over Gemini 2.5 Flash TTS. It converts text into natural audio across 70+ languages, with significantly expanded language coverage and improved quality. The model introduces 200+ inline audio control tags (e.g., [whispers], [laughs], [excited]) for fine-grained control over emotion, tone, and pacing, along with support for two speakers with independent voice and style settings. It outputs 24 kHz / 16-bit PCM audio, includes SynthID watermarking, and supports a 32K token context window. Designed for expressive and controllable voice generation, it is well suited for dialogue systems, storytelling, character-driven content, and advanced audio production workflows.