Elon’s xAI has been making progress quick now. It open-sourced Grok-1 less than 2 weeks ago and is now announcing Grok-1.5.18
xAI announced Grok-1.5 and improvement over their previous model Grok-1.

Grok 1.5 gets two improvements over it’s baby brother Grok-1.
It has gotten better in reasoning, math, and code generation.
It joins the long-context game with accepting upto 128k tokens.
Based on benchmarks, Grok-1.5 looks like another model that’s almost near GPT-4 level (March 2023 one) but not quite there. Others in this category are Mistral-large and Claude 3 Sonnet.
Grok-1.5 will be available to early testers and users on X (Twitter) soon.
Although there’s no mention of open-sourcing Grok-1.5, I consider the possibility high based on Elon’s ongoing lawsuit with OpenAI. It hasn’t been long since Grok-1 was open sourced, so we have to wait and see how it affects the open-source ecosystem. But I consider that it won’t negligible.
Also, it’s interesting to see xAI making quick progress. Grok-1.5’s context window should be able to use near a thousand tweets in one go. Imagine asking Grok, “Hey, what all did Ben tweet about in last month?”
Grok 1.5 - xAI's new model reasons better
| 18 | x.ai/blog/grok-1.5 |
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Beehiiv · bites