I figured out a loophole to remove Claude watermark WITHOUT rephrasing
▲ 176 r/ArtificialNtelligence+8 crossposts

I figured out a loophole to remove Claude watermark WITHOUT rephrasing

I've been curious whether you can kill an Claude's text watermark just by editing (not "rewriting/rephrasing") what it wrote. And so I built a Claude/OpenAI/Gemini text-watermark generator plus a detector and threw a bunch of attacks at gpt-oss-20b and Qwen outputs to find out. The technique relies on the famous Tournament Sampling built upon standard Gumbel-max sampling.

It turns out almost everything people assume works, doesn't. Swapping em-dashes for hyphens, stripping markdown, converting AmE to BrE spellings... none of it moved the needle. Across nearly 300 test runs only one attack crossed the detection threshold, and that was deleting 40% of every word, which just wrecks the text.

After rigorous benchmarking, the only method that consistently beat 10/10 times was inserting invisible Unicode variation selectors (the same characters used for emoji and CJK rendering) throughout the text. Performed that to about 30% of characters and the watermark score dropped from 45 down to under 1. And unlike every other invisible character trick I tried, this one survives normalization, because these are real meaningful codepoints that a normalizer can't safely strip.

Interesting finding: Code is barely watermarked to begin with. Watermark strength tracks how uncertain the model is about the next token, and code is low entropy, so some code samples come out basically unwatermarked with zero attack at all.

Not the first repo doing this kind of attack, I know, but I wanted to actually spend the weekend testing it properly across a few different open models instead of rushing something half-baked out.

Repo with all the code and results: https://github.com/aloshdenny/claude-awm

Interactive demo where you can try the attack yourself: https://aloshdenny.com/claude-awm/

Check it out and let me know what you think!

u/Available-Deer1723 — 3 days ago

Planning my first Himalayan peak after Ladakh - Mera, Island Peak, Lobuche East, or Annapurna?

Hi everyone,

Earlier this year I posted here about planning my first high-altitude trip to Ladakh. That trip ended up happening, and I absolutely loved it - motorcycle riding through Nubra, Pangong, Hanle, Umling La, Tso Moriri, etc. It was my first real experience with high altitude and definitely made me want to do more in the Himalayas.

Now I’m planning my next Nepal trip, and I’m trying to decide whether I should stick to a high-altitude trek or take the next step toward actual mountaineering.

At the moment I'm considering:

* Mera Peak (6,476 m)

* Island Peak (6,189 m)

* Lobuche East (6,119 m)

* Annapurna Circuit + Tilicho Lake

* Potentially another suitable 6,000m-class peak if there's a better option

My thinking is that Annapurna/Thorong La would be a good progression from Ladakh in terms of altitude and multi-day trekking, while Mera/Island/Lobuche would introduce me to things I haven't done before - crampons, ice axe, glacier travel, fixed ropes, etc.

I'm reasonably fit and have done high-altitude travel in Ladakh, but I don't have previous mountaineering or glacier-climbing experience. So I'm trying to be realistic rather than just picking the highest mountain I can find.

One complication is timing: I'm looking at late August / early September 2026, although I could potentially move the actual peak climb to October/November or even December if that makes substantially more sense.

I'd love some advice from people who have actually climbed these peaks:

  1. Which would you recommend as a first Himalayan 6,000er - Mera, Island Peak or Lobuche East?

  2. Is Mera Peak actually a good first step into mountaineering, or is it too ambitious without previous glacier experience?

  3. Would you recommend doing Annapurna Circuit + Tilicho first, then a peak later?

  4. How different is the experience/difficulty between Mera, Island and Lobuche?

  5. Is December a reasonable time for Mera/Island/Lobuche, or should I absolutely target October–November?

  6. If I go to Nepal in late August/early September, what would be the best trek/circuit given the monsoon? Upper Mustang seems particularly interesting.

  7. Are there any lesser-known 5,500–6,500m peaks that would actually be a better first mountaineering objective?

  8. For someone coming from India, what kind of training/acclimatization would you recommend before attempting one of these?

I'm not particularly interested in simply ticking off Everest Base Camp. What I'm really looking for is a progression from high-altitude trekking → basic mountaineering → eventually more technical Himalayan climbing.

For reference, this is roughly how I'm thinking about the progression:

Ladakh → Annapurna/another high-altitude trek → Mera/Island/Lobuche → more technical peaks

If you've done any of these recently, I'd especially appreciate hearing about your actual experience, itinerary, approximate cost, operator/guide setup, and what you wish you'd known beforehand.

Thanks!

reddit.com
u/Available-Deer1723 — 11 days ago
▲ 1 r/Nepal

Planning my first Himalayan peak after Ladakh - Mera, Island Peak, Lobuche East, or Annapurna?

Hi everyone,

Earlier this year I posted here about planning my first high-altitude trip to Ladakh. That trip ended up happening, and I absolutely loved it - motorcycle riding through Nubra, Pangong, Hanle, Umling La, Tso Moriri, etc. It was my first real experience with high altitude and definitely made me want to do more in the Himalayas.

Now I’m planning my next Nepal trip, and I’m trying to decide whether I should stick to a high-altitude trek or take the next step toward actual mountaineering.

At the moment I'm considering:

* Mera Peak (6,476 m)

* Island Peak (6,189 m)

* Lobuche East (6,119 m)

* Annapurna Circuit + Tilicho Lake

* Potentially another suitable 6,000m-class peak if there's a better option

My thinking is that Annapurna/Thorong La would be a good progression from Ladakh in terms of altitude and multi-day trekking, while Mera/Island/Lobuche would introduce me to things I haven't done before - crampons, ice axe, glacier travel, fixed ropes, etc.

I'm reasonably fit and have done high-altitude travel in Ladakh, but I don't have previous mountaineering or glacier-climbing experience. So I'm trying to be realistic rather than just picking the highest mountain I can find.

One complication is timing: I'm looking at late August / early September 2026, although I could potentially move the actual peak climb to October/November or even December if that makes substantially more sense.

I'd love some advice from people who have actually climbed these peaks:

  1. Which would you recommend as a first Himalayan 6,000er - Mera, Island Peak or Lobuche East?

  2. Is Mera Peak actually a good first step into mountaineering, or is it too ambitious without previous glacier experience?

  3. Would you recommend doing Annapurna Circuit + Tilicho first, then a peak later?

  4. How different is the experience/difficulty between Mera, Island and Lobuche?

  5. Is December a reasonable time for Mera/Island/Lobuche, or should I absolutely target October–November?

  6. If I go to Nepal in late August/early September, what would be the best trek/circuit given the monsoon? Upper Mustang seems particularly interesting.

  7. Are there any lesser-known 5,500–6,500m peaks that would actually be a better first mountaineering objective?

  8. For someone coming from India, what kind of training/acclimatization would you recommend before attempting one of these?

I'm not particularly interested in simply ticking off Everest Base Camp. What I'm really looking for is a progression from high-altitude trekking → basic mountaineering → eventually more technical Himalayan climbing.

For reference, this is roughly how I'm thinking about the progression:

Ladakh → Annapurna/another high-altitude trek → Mera/Island/Lobuche → more technical peaks

If you've done any of these recently, I'd especially appreciate hearing about your actual experience, itinerary, approximate cost, operator/guide setup, and what you wish you'd known beforehand.

Thanks!

reddit.com
u/Available-Deer1723 — 11 days ago

Planning my first Himalayan peak after Ladakh - Mera, Island Peak, Lobuche East, or Annapurna?

Hi everyone,


Earlier this year I posted here about planning my first high-altitude trip to Ladakh. That trip ended up happening, and I absolutely loved it - motorcycle riding through Nubra, Pangong, Hanle, Umling La, Tso Moriri, etc. It was my first real experience with high altitude and definitely made me want to do more in the Himalayas.


Now I’m planning my next Nepal trip, and I’m trying to decide whether I should stick to a high-altitude trek or take the next step toward actual mountaineering.


At the moment I'm considering:


* Mera Peak (6,476 m)
* Island Peak (6,189 m)
* Lobuche East (6,119 m)
* Annapurna Circuit + Tilicho Lake
* Potentially another suitable 6,000m-class peak if there's a better option


My thinking is that Annapurna/Thorong La would be a good progression from Ladakh in terms of altitude and multi-day trekking, while Mera/Island/Lobuche would introduce me to things I haven't done before - crampons, ice axe, glacier travel, fixed ropes, etc.


I'm reasonably fit and have done high-altitude travel in Ladakh, but I don't have previous mountaineering or glacier-climbing experience. So I'm trying to be realistic rather than just picking the highest mountain I can find.


One complication is timing: I'm looking at late August / early September 2026, although I could potentially move the actual peak climb to October/November or even December if that makes substantially more sense.


I'd love some advice from people who have actually climbed these peaks:


1. Which would you recommend as a first Himalayan 6,000er - Mera, Island Peak or Lobuche East?
2. Is Mera Peak actually a good first step into mountaineering, or is it too ambitious without previous glacier experience?
3. Would you recommend doing Annapurna Circuit + Tilicho first, then a peak later?
4. How different is the experience/difficulty between Mera, Island and Lobuche?
5. Is December a reasonable time for Mera/Island/Lobuche, or should I absolutely target October–November?
6. If I go to Nepal in late August/early September, what would be the best trek/circuit given the monsoon? Upper Mustang seems particularly interesting.
7. Are there any lesser-known 5,500–6,500m peaks that would actually be a better first mountaineering objective?
8. For someone coming from India, what kind of training/acclimatization would you recommend before attempting one of these?


I'm not particularly interested in simply ticking off Everest Base Camp. What I'm really looking for is a progression from high-altitude trekking → basic mountaineering → eventually more technical Himalayan climbing.


For reference, this is roughly how I'm thinking about the progression:


Ladakh → Annapurna/another high-altitude trek → Mera/Island/Lobuche → more technical peaks


If you've done any of these recently, I'd especially appreciate hearing about your actual experience, itinerary, approximate cost, operator/guide setup, and what you wish you'd known beforehand.


Thanks!
reddit.com
u/Available-Deer1723 — 11 days ago