Mercor (@mercor) / X

Mercor
@mercor
Oct 8
Introducing the Mercor Research team. We’re building a world-class research organization, including @edwardjhu (first author of LoRA), @MinyangTian1 (SciCode, CritPt), Victor Barres (τ²-bench, τ-voice), @hrdkbhatnagar (PostTrainBench), @bertievidgen (APEX-Agents) and many
Why Mercor is building a research team
From mercor.com
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Mercor
@mercor
Oct 8
Claude Haiku 5.5 debuts at #7 on APEX-SWE. 55.1% Pass@1, ahead of last generation's Opus and Sonnet models. It achieves this score using 1/20th of Sonnet 5.5's input and output cost. Congrats @AnthropicAI on the launch. 𝗖𝗼𝗱𝗶𝗻𝗴 Anthropic positions Haiku 5.5 as a coding
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Mercor
@mercor
Oct 7
Watch Mercor's Head of AI modeling @edwardjhu to learn about AI data, evaluation, and model training. Find out why "the closer we are to how AI actually gets deployed, the more realistic the benchmarks will be."
Nathan Labenz
@labenz
Oct 7
Up now on AI:AM: Edward Hu (@edwardjhu), inventor of LoRA and Head of AI Modeling at @mercor. The question: once models clear the benchmarks built to stump them on professional work, what's left to measure? x.com/i/broadcasts/1…
REPLAY
Nathan Labenz
@labenz
Formal AI Safety & Risk Strategy + LoRA-Powered Work Agents
Mercor
@mercor
Oct 5
Today Reflection released Beam, their first open-weight model. Beam was trained with a particular focus on coding and agentic performance, advancing the Western open-weights frontier. Congratulations to the @reflection_ai team.
Reflection
@reflection_ai
Oct 5
Introducing Beam: a highly efficient agentic open model with 501B total parameters and 23B active. - Frontier reasoning efficiency - Advances the Western open frontier on coding & agentic tasks - Trained end-to-end from scratch Full weights release this month. Learn more about
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Mercor
@mercor
Oct 1
APEX turns 1 today. Last year, we launched the AI Productivity Index (APEX) to answer whether frontier AI models can do professional work. Since then, we’ve created new benchmarks while model capabilities progress more rapidly than even the boldest predictions. APEX remains the
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