Building Grok @xai, CS PhD @JohnsHopkins; Previous @GoogleAI
Palo Alto, CA
Joined October 2018
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Junfei Xiao retweeted
Watch Episode 1 of our Odyssey series made with Grok Imagine.
Let us know in the comments if you'd like a full breakdown of how it was done!
Creative collaboration with @WonderStudiosX and director Dev Walker @glumlot_
Junfei Xiao retweeted
Video 1.5 Lite is live in the Grok Imagine API. The new workhorse for text-to-video and image-to-video.
$0.02/sec at 480p
$0.03/sec at 720p
$0.14/sec at 1080p
Junfei Xiao retweeted
No cameras. No sets. Just two filmmakers with a mission:
Push @imagine's cinematic capabilities to their limits and make a pilot of Homer’s Odyssey.
@WonderStudiosX, an AI-native creative studio who partnered with us on this, delivered the pilot in 15 days, using 2,070 images and 1,558 videos.
Here’s a thread on the best tips from creative lead Dev Walker 🧵
Try our video agentic mode! Better and longer videos will always be there.
Very excited to ship Grok Imagine Video 1.5 agent! @spacexai is constantly pushing the frontier of intelligence and usefulness. More to come.
Junfei Xiao retweeted
BREAKING: SpaceXAI has released a major new update for Grok Build (v1.0.13).
The update improves reliability with automatic retries and recovery from truncated responses, inference failures, oversized images and session-saving issues.
It also adds smarter hooks, better Windows support, faster MCP and session startup, improved scheduled tasks and quicker compressed CLI downloads.
Features
• Length-truncated responses now continue automatically instead of failing the turn.
• Hooks can now ask the user to confirm a tool call instead of always allowing or denying.
• Hooks can now request deferral or add context shown to the model after a tool runs.
• Session close now records detailed timing data for performance analysis.
• Credit limit upsell now offers a Try Again button to retry the last prompt.
• Pasted images now show a live pixel preview in the prompt box on iTerm2.
Bug Fixes
• Transient inference failures (stalls, drops, 5xx) now retry automatically instead of ending the turn.
• Windows users can now correctly open ~/.grok and worktree sessions.
• Session data is now more reliably saved after prompts and on power loss.
• Compaction failures now show the actual error instead of a generic message.
• Truncation error messages now show the right guidance instead of suggesting an unhelpful retry.
• Truncated tool calls are now executed instead of failing the turn when arguments are complete.
• Images larger than 2000px no longer brick sessions on many-image requests.
• Wrapped hyperlinks in the pager now remain fully clickable on Windows Terminal instead of only the first line.
• Recurring scheduled tasks now include a reminder to stop the monitor when work finishes.
• Scheduled task IDs are now full UUID strings, preventing collisions when tasks are created in the same millisecond.
Performance
• Subagent spawning is faster when connections drop during bursts.
• Session startup with MCP servers is now much faster when auth is already configured.
• MCP server startup no longer stalls behind a fixed batch size.
• CLI downloads are now compressed, making fresh installs and updates substantially faster.
Download Grok Build: x.ai/build
Update to the latest Alpha release: grok update --alpha
Update to the latest Stable release: grok update
Junfei Xiao retweeted
Create with Grok Imagine
Homer had a lyre. You have Grok Imagine.
Create a compelling scene from Homer’s The Odyssey that shows what Grok @Imagine’s video and voice capabilities can do. We’re awarding $100K, $50K, and $25K to the top three videos submitted by quoting this post. 🧵
Junfei Xiao retweeted
You can make your own steampunk movies with Grok Imagine
Grok Imagine just got a new member - Image 2.0, a really good mate for video generation.
grok.com/imagine/post/2883bf…
🤖 Made with AI
Announcing Imagine Image 2.0, our next generation image model with precision editing, crisp text rendering, improved factuality, and real world usefulness.
Image 2.0 helps you make images for real work.
x.ai/news/grok-imagine-image…
Junfei Xiao retweeted
Grok Imagine is evolving rapidly. Today, a great image model needs to go beyond aesthetics, it must also deliver factual accuracy and real-world usefulness. Achieving this requires reasoning, planning, factual grounding, and self-reflection.
We’re planning to release several tiers of new image models, each offering different levels of capability and intelligence. Today, we’re introducing the base version, with more to come over next days. try it out in grok.com/imagine
🤖 Made with AI
Junfei Xiao retweeted
Announcing Imagine Image 2.0, our next generation image model with precision editing, crisp text rendering, improved factuality, and real world usefulness.
Image 2.0 helps you make images for real work.
x.ai/news/grok-imagine-image…