Tim Osborn

Climate variability and change | Professor of Climate Science & Director of Climatic Research Unit | @ueaenv | UEA | Views expressed here are my own, not UEA's

[Nav Toor @heynavtoor]

Researchers sent the same resume to an AI hiring tool twice. Same qualifications. Same experience. Same skills. One version was written by a real human. The other was rewritten by ChatGPT.

The AI picked the ChatGPT version 97.6% of the time.

A team from the University of Maryland, the National University of Singapore, and Ohio State just published the receipt. They took 2,245 real human-written resumes pulled from a professional resume site from before ChatGPT existed, so the human writing was actually human. Then they had seven of the most-used AI models in the world rewrite each one. GPT-4o. GPT-4o-mini. GPT-4-turbo. LLaMA 3.3-70B. Qwen 2.5-72B. DeepSeek-V3. Mistral-7B.

Then they asked each AI to pick the better resume. Every model picked itself.

GPT-4o hit 97.6%. LLaMA-3.3-70B hit 96.3%. Qwen-2.5-72B hit 95.9%. DeepSeek-V3 hit 95.5%. The real human almost never won.

Then the researchers tried the obvious objection. Maybe the AI is just better at writing. So they had real humans grade the resumes for actual quality and ran the experiment again, controlling for it. The result was worse. Each AI kept picking itself even when human judges rated the human-written version as clearer, more coherent, and more effective.

It gets worse. The AIs do not just prefer AI over humans. They prefer themselves over other AIs. DeepSeek-V3 picked its own resumes 69% more often than LLaMA's. GPT-4o picked its own 45% more often than LLaMA's. Each model can recognize and reward its own dialect.

Then the researchers ran the simulation that ends careers. Same job. 24 occupations. Same qualifications. The only variable was whether the candidate used the same AI as the screening tool. Candidates using that AI were 23% to 60% more likely to be shortlisted. Worst gap was in sales, accounting, and finance.

99% of large companies now run AI on incoming resumes. Most of them use GPT-4o. The paper just proved GPT-4o picks GPT-4o 97.6% of the time.

If you wrote your own cover letter this week, you did not lose to a better candidate. You lost to a worse candidate who paid OpenAI 20 dollars.

Your qualifications do not matter if the AI prefers its own handwriting over yours.

[Tyndall Centre for Climate Change Research @TyndallCentre]

NEW PROFESSORSHIP in Climate and the Environment 🌎

Lead world-class research on climate and the environment, enhancing our understanding of global change and associated hazards to inform or promote societal responses ⬇️ https://t.co/xgMMTq23JR

[Tyndall Centre for Climate Change Research @TyndallCentre]

New Professorship position🌎

The @uniofeastanglia.bsky.social seeks an inspiring, innovative + dedicated person to lead world-class research in any aspect of climate and the environment: https://t.co/xgMMTq23JR

#AcademicJobs #EduSky #ProfessorJobs #ClimateChange

[Tyndall Centre for Climate Change Research @TyndallCentre]

Big climate steps at UEA🌎

🟢One of 8 UK universities partnering w/ Met Office
🟢Tyndall's Prof. Andrew Jordan joins CCC
🟢William Collins joins as Prof. of AI for Climate Science
🟢Recruiting Sir Anthony Habgood Professor of Climate & Environment

https://t.co/LN4cpTTKUX

[Daniel Swain @Weather_West]

The astonishing rate of March snowmelt in Colorado River Basin continues, and is now well into record-low territory (even, it appears, relative to pre-SNOTEL era). And the extreme regional heatwave is only slowly fading, with unprecedented March melt continuing in meantime.

[Bulletin of the Atomic Scientists @BulletinAtomic]

"Knowledge is rarely, if ever, advanced through censorship."

David L. Faigman, Erwin Chemerinsky, Ben Santer, & Lynn Nadel on the recent removal of the climate science chapter in the Federal Judicial Center’s Reference Manual on Scientific Evidence.
https://t.co/zcaADaCOq1

[Emma 💛💙🇩🇰🇬🇧🇪🇺 @MonkEmma]

Oh boy! What a headline...

Ask yourself:

"What am I being asked to believe?"

"Who am I being told to blame?"

Take a few seconds to imagine what the Daily Mail (And Telegraph, GB News and Express) WANT you to think is going on.

Let's see what's ACTUALLY happening...🧵

1/21

[Andrew Dessler @AndrewDessler]

@IBergwiesel OK, trying again since the last link didn’t work …

I asked chatGPT to give me a peer review and it concluded the same thing: reject

https://t.co/j8qjnjofqL

[Indonesisches Bergwiesel @IBergwiesel]

I had Claude read Cohler et al (2026) and it turned into a straight-up massacre.

https://t.co/n3L11KAh15

[Andrew Dessler @AndrewDessler]

I've been getting a lot of requests for comments from reporters about the removal of the DOE Climate Working Group report from the EPA's repeal of the endangerment finding.

Here are some comments.

[Zeke Hausfather @hausfath]

The scientific understanding of human-driven climate change is much stronger today than it was in 2009 when the EPA first issued the endangerment finding. There is no scientific basis for the Trump administration's decision to repeal it https://t.co/l5qmBNkADn

[Laura Tobin. @Lauratobin1]

🧊 Frozen rivers in Poland
🌧️ 💨 🏠 Floods in Portugal
🌊 🛣️ Collapsed roads in Devon
https://t.co/P9gqCRD1mO

[Ed Hawkins @ed_hawkins]

Climate 'fingerprints' mark human activity from the top of the atmosphere to the bottom of the ocean

See this article for details of why the lower atmosphere warms and the upper atmosphere cools, giving this human-induced warming fingerprint: https://t.co/UGWZbxF9o9

[Official Weather UK ☀️ @Official_WXUK]

A section of the A379 Slapton Line coastal road between Torcross and Slapton in south Devon collapsed and washed away early this morning as high spring tides hit southern coasts. Sea defences protecting the road were damaged during the storms last month.

[Emma 💛💙🇩🇰🇬🇧🇪🇺 @MonkEmma]

@sharrond62 Oh FFS.

Every. Single. Time🙄

[John Fasullo @jfasullo]

What Americans Lose If Their National Center for Atmospheric Research Is Dismantled https://t.co/SsQxgMjcm7

[Carbon Brief @CarbonBrief]

Prof Ben Santer: Trump administration is ‘embracing ignorance’ on climate science | @rtmcswee

Read here: https://t.co/ruo3MTaDXC

[MarshFamilySongs @MarshSongs]

"Battle Hymn of the Republic" is not a song to be taken on lightly ... but in light of this week's New Year Trumpian news onslaught, we're sharing this adaptation, called "Battle Hymn of the Empire" - as Trump goes marching on, and dragging us all back to the nineteenth century.

[Jon Burke 🌍 @jonburkeUK]

The Australian trade deal that @trussliz struck - despite extensive warnings from civil servants - is turning out to be a disaster for British farmers, you say?

If only we could have foretold this in some way…🤔

[The Secret Barrister 🦋 @BarristerSecret]

NEW BLOGPOST

Abolishing trial by jury: why is the government overlooking the obvious?

https://t.co/a3I0uz1Mbf