SpaceXAI Launches Grok Voice Think Fast 2.0 Voice Model Priced at $0.08 a Minute
SpaceXAI has launched Grok Voice Think Fast 2.0, a voice model optimized for agentic workflows, available via the API and Voice Agent Builder at $0.08 per minute. The high-reasoning variant cuts the time to first audio to 0.70 seconds, making it the only model in the top five of the Artificial Analysis Speech to Speech Index to meet the one-second latency threshold.
On the benchmark index, the model debuts at second place with an 82.9% score, trailing Qwen Audio 3.0 Realtime Plus and outperforming OpenAI’s GPT-Realtime-2 series. SpaceXAI increased the pricing by $1.80 per hour compared to the previous generation, though the update remains roughly 2.2 times cheaper than GPT-Realtime-2.1 High. The new model targets improved transcription accuracy in noisy environments and utilizes fewer reasoning tokens for faster interactions.
From the sources (16 posts)
@spacexaiAnnouncing Grok Voice Think Fast 2.0, our next-generation voice model with improved intelligence, transcription accuracy, and conversational capabilities.
@spacexaiGrok Voice Think Fast 2.0 is built for voice agents in the real world. It hears clearly in noisy conditions, reasons through complex workflows, and sounds more natural in conversation.
@spacexaiTry Grok Voice Think Fast 2.0 today in the API and Voice Agent Builder, at $0.08/min.
@elonmuskRT @cb_doge: BREAKING: SpaceXAI's newly released Grok Voice Think Fast 2.0 beats voice models from OpenAI, Google, Alibaba, and DeepSlate i…
@mark_kBig Grok Voice upgrade from @SpaceXAI. Grok Voice Think Fast 2.0 tops the Artificial Analysis Speech-to-Speech Quality Index at 82.9%, cuts time to first audio from 1.25s to just 0.70s, and brings major transcription improvements, especial
@elonmuskTry the new Grok Voice
@techdevnotesgrok-voice-think-fast-2.0 costs $0.08 / minute ($4.80 / hour)
@techdevnotesSpaceXAI has released Grok Voice Think Fast 2.0
@andrewcurran_RT @SpaceXAI: Announcing Grok Voice Think Fast 2.0, our next-generation voice model with improved intelligence, transcription accuracy, and…
@jasonbudRT @SpaceXAI: Announcing Grok Voice Think Fast 2.0, our next-generation voice model with improved intelligence, transcription accuracy, and…
@milichabRT @SpaceXAI: Announcing Grok Voice Think Fast 2.0, our next-generation voice model with improved intelligence, transcription accuracy, and…
@artificialanlysGrok Voice Think Fast 2.0 High costs $4.80 per hour of input audio, up from $3.00 for Grok Voice Think Fast 1.0. This places it above Qwen Audio 3.0 Realtime Plus ($4.42) and GPT-Realtime-2 High ($4.14), but ~2.2x cheaper than GPT-Realtime-
@artificialanlysGrok Voice Think Fast 2.0 High delivers its intelligence gains with a comparably lower latency trade-off - average Time to First Audio on the Big Bench Audio benchmark is 0.70 seconds, making it the only model in the top 5 of our Speech to
@artificialanlysGrok Voice Think Fast 2.0 High costs $4.80 per hour of input audio, up from $3.00 for Grok Voice Think Fast 1.0. This places it above Qwen Audio 3.0 Realtime Plus ($4.42) and GPT-Realtime-2 High ($4.14), but ~2.2x cheaper than GPT-Realtime-
@artificialanlysGrok Voice Think Fast 2.0 High takes the #1 spot on Tau Voice, our benchmark for agentic performance at 56.5%, just ahead of Qwen Audio 3.0 Realtime Plus at 54.6% and Grok Voice Think Fast 1.0 at 52.1%. On Big Bench Audio it achieves 97.2%,
@artificialanlysSpaceXAI has released Grok Voice Think Fast 2.0 today, with the High reasoning variant debuting at #2 on the Artificial Analysis Speech to Speech Index at 82.9%, and #1 on Tau Voice for Agentic Performance at 56.5% - among the fastest model