The diffusion LLM that scaled 40x without slowing down
Mercury 3 is the most capable diffusion LLM released to date. It outperforms GPT-6 Luna and Claude Haiku 5.5 while running 4–8x faster at 1,000+ tokens per second.
Mercury 3 is more than 40x the size of Mercury 1, and it still generates at over 1,000 tokens/sec on NVIDIA Blackwell GPUs.
It's a diffusion LLM, generating and refining tokens in parallel instead of predicting them one by one. The context window has also grown from 260K to 1M tokens, with Inception reporting performance around GPT-6 Luna and Claude Haiku 5.5.
Early partners are already using it for browser agents, real-time tutoring, search and customer support. A browser agent might call the model dozens of times for one task, so those seconds can add up quickly.
It's available through an OpenAI-compatible API and OpenRouter.
About Mercury 3 on Product Hunt
“The diffusion LLM that scaled 40x without slowing down”
Mercury 3 launched on Product Hunt on October 22nd, 2026 and earned 112 upvotes and 4 comments, placing #11 on the daily leaderboard. Mercury 3 is the most capable diffusion LLM released to date. It outperforms GPT-6 Luna and Claude Haiku 5.5 while running 4–8x faster at 1,000+ tokens per second.
On the analytics side, Mercury 3 competes within API, Artificial Intelligence and Development — topics that collectively have 586.9k followers on Product Hunt. The dashboard above tracks how Mercury 3 performed against the three products that launched closest to it on the same day.
Who hunted Mercury 3?
Mercury 3 was hunted by Zac Zuo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Mercury 3 including community comment highlights and product details, visit the product overview.
Zac Zuo
Hi everyone!
Mercury 3 is more than 40x the size of Mercury 1, and it still generates at over 1,000 tokens/sec on NVIDIA Blackwell GPUs.
It's a diffusion LLM, generating and refining tokens in parallel instead of predicting them one by one. The context window has also grown from 260K to 1M tokens, with Inception reporting performance around GPT-6 Luna and Claude Haiku 5.5.
Early partners are already using it for browser agents, real-time tutoring, search and customer support. A browser agent might call the model dozens of times for one task, so those seconds can add up quickly.
It's available through an OpenAI-compatible API and OpenRouter.