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xAI Ships Grok 4.5 as OpenAI Rolls Out GPT-Live Voice Models

July 9, 2026 at 14:26 EDT

Foundation Models
Software Dev & Coding
AI Agents

SpaceXAI (an xAI-affiliated company) released its flagship model Grok 4.5 on July 8, 2026, while OpenAI unveiled and began rolling out new voice models, GPT-Live-1 and GPT-Live-1 mini, for real-time conversation around the same time, reigniting the AI model race.

July 8, 2026 · The AI Model Race

Two Bets on the Future: Cheaper Code vs. Real-Time Voice

SpaceXAI's Grok 4.5 arrives as an "Opus-class" coding flagship priced at roughly half its rivals, while OpenAI rolls out GPT-Live-1 — full-duplex voice built to talk, listen and be interrupted like a person.

500k

token context window on Grok 4.5

~½

the price of rival flagship models

150M+

people already using voice features

Grok 4.5 API price · per 1M tokens

Output tokens cost three times the input rate.

$2.00

Input

$6.00

Output

Grok 4.5

SpaceXAI · coding flagship

"Opus-class," co-trained with Cursor
Trained on tens of thousands of NVIDIA GB300 chips
Agentic workflows & configurable reasoning depth
500k-token context, minimal hallucinations

GPT-Live-1 / mini

OpenAI · real-time voice

Full-duplex: talk while listening
Natural interruptions & long-silence understanding
Paid users get GPT-Live-1, free tier gets mini
Rolling out on iOS, Android & web; API planned

Praise

Developers cite speed, low cost and strong coding — climbing sharply on the coding index, staying within usage limits after a full day, and generating SaaS pages and apps in demos.

Caveats

Some say Grok 4.5 misses key details and isn't the clear leader on one-shot accuracy, that rivals solve certain tasks in one pass — and it is reportedly unavailable in the EU.

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