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G4-MeroMero-v2-31B
zerofata/G4-MeroMero-v2-31B
G4-MeroMero-v2-31B is a machine learning model from zerofata. Use it for the machine learning task on the model card, and read the license before you ship it in a product. The card lists the license as apache-2.0.
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At a glance
- License
- apache-2.0
- Model type
- gemma4
- Access
- Public
- Created
- Jul 31, 2026
- Updated
- Aug 3, 2026
- SHA
- a72eca19
Base models
Model card
From the Hugging Face model README
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Stardom</title>
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<div class="gs-ident">
<h1 class="gs-name">Mero Mero v2</h1>
<span class="gs-base">Gemma4 31B</span>
</div>
</div>
</div>
<div class="gs-section">
<div class="gs-shead">
<span class="gs-snum">01</span>
<span class="gs-stitle">Overview</span>
</div>
<div class="gs-sbody">
<p></p>
<p>A finetune of Gemma 4 31B designed for creative tasks, particularly narrative RP. Intended to be a more creative version of <a href="https://huggingface.co/zerofata/G4-MeroMero-31B">G4-MeroMero-31B</a>.</p>
<p>This model is the result of a lot of experimentation and learning. Trying to make Gemma 4 more creative without destroying the intelligence is... difficult. To put it mildly.</p>
<p style="margin-top:16px">Heavily inspired by a few research papers, <a href="https://arxiv.org/abs/2604.03136">StoryScope: Investigating idiosyncrasies in AI fiction
</a> and particularly <a href="https://arxiv.org/abs/2605.26492">Elias in the Lighthouse, Again?</a>. Measuring these narrative tics and attractors against simple prompts seems to be a good way to target the model's slop and kick start giving Gemma 4 some diversity: anything that repeatedly occurs across generations of such a generic prompt is something the model is overusing.</p>
<p>Compared to the original, swipes are notably more diverse and feel less like Gemma. RP slop is measurably lower (at least for the type of slop I measure). IFEval / GSM8K / MMLU-Pro are the same as stock with no obvious degradation. The only intelligence drop I've really noticed so far is when you get a swipe that goes a bit hot.</p>
<p>Supports both thinking and non thinking. Reasoning averages longer than stock Gemma 4, but shorter than MeroMero v1.</p>
</div>
</div>
<div class="gs-section">
<div class="gs-shead">
<span class="gs-snum">02</span>
<span class="gs-stitle">SillyTavern Settings</span>
</div>
<div class="gs-sbody">
<div class="gs-stack">
<div class="gs-panel">
<div class="gs-panel-head">Suggested Roleplay Format</div>
<div class="gs-row"><span class="gs-key">Actions</span><span class="gs-val">In plaintext</span></div>
<div class="gs-row"><span class="gs-key">Dialogue</span><span class="gs-val">"In quotes"</span></div>
<div class="gs-row"><span class="gs-key">Thoughts</span><span class="gs-val">*In asterisks*</span></div>
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<div class="gs-row"><span class="gs-key">Temp</span><span class="gs-val">0.8 - 1.0</span></div>
<div class="gs-row"><span class="gs-key">MinP</span><span class="gs-val">0.05</span></div>
<div class="gs-row"></span><span class="gs-val"></span></div>
</div>
<div class="gs-panel">
<div class="gs-panel-head">Instruct</div>
<div class="gs-row"><span class="gs-val"><a href="https://huggingface.co/zerofata/G4-MeroMero-v2-31B/raw/main/Gemma4-Think.json">Gemma 4 - Think</a></span></div>
<div class="gs-row"><span class="gs-val"><a href="https://huggingface.co/zerofata/G4-MeroMero-v2-31B/raw/main/Gemma4-NoThink.json">Gemma 4 - NoThink</a></span></div>
</div>
</div>
</div>
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<div class="gs-section gs-section--compact">
<div class="gs-shead">
<span class="gs-snum">03</span>
<span class="gs-stitle">Quantizations</span>
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<div class="gs-sbody">
<div class="gs-qrow">
<div class="gs-qpanel">
<span class="gs-qtype">GGUF</span>
<div class="gs-qsep"></div>
<a href="https://huggingface.co/zerofata/G4-MeroMero-v2-31B-GGUF">iMatrix</a>
</div>
</div>
</div>
</div>
<div class="gs-section">
<div class="gs-shead">
<span class="gs-snum">04</span>
<span class="gs-stitle">Evaluation</span>
</div>
<div class="gs-sbody">
<table class="gs-etable">
<tr><th></th><th class="gs-ecol">Mero Mero v2</th><th>Mero Mero v1</th><th>Stock Gemma 4</th></tr>
<tr class="gs-egroup"><td colspan="4">Swipe diversity — given an RP conversation, generate 8 swipes and evaluate how varied the beats in those swipes are, GLM-judged with a rubric.</td></tr>
<tr><td>Thinking off</td><td class="gs-best">0.72</td><td>0.57</td><td>0.43</td></tr>
<tr><td>Thinking on</td><td class="gs-best">0.62</td><td>0.49</td><td>0.32</td></tr>
<tr class="gs-egroup"><td colspan="4">Slop & attractors — lower is better</td></tr>
<tr><td>Slop per 1k words, RP replies</td><td class="gs-best">15.5</td><td>18.0</td><td>18.5</td></tr>
<tr><td>Slop per 1k words, stories</td><td class="gs-best">7.4</td><td>8.3</td><td>8.8</td></tr>
<tr><td>Bare-prompt stories hitting an attractor</td><td class="gs-best">66%</td><td>98%</td><td>99%</td></tr>
<tr class="gs-egroup"><td colspan="4">Top attractor markers — each model's six most frequent, stories containing each of 144</td></tr>
<tr><td>#1</td><td>Tuesday · 28</td><td>Elias · 96</td><td>Elias · 102</td></tr>
<tr><td>#2</td><td>Arthur · 20</td><td>Tuesday · 81</td><td>Tuesday · 90</td></tr>
<tr><td>#3</td><td>Elias · 19</td><td>Clara · 57</td><td>Clara · 80</td></tr>
<tr><td>#4</td><td>Leo · 16</td><td>Oakhaven · 46</td><td>Oakhaven · 60</td></tr>
<tr><td>#5</td><td>Elara · 14</td><td>Arthur · 21</td><td>Thorne · 23</td></tr>
<tr><td>#6</td><td>Clara · 14</td><td>Leo · 20</td><td>Arthur · 16</td></tr>
<tr class="gs-egroup"><td colspan="4">Thinking length — words per think block, RP replies; shorter is better</td></tr>
<tr><td>Mean / median</td><td>341 / 305</td><td>382 / 342</td><td class="gs-best">263 / 253</td></tr>
<tr class="gs-egroup"><td colspan="4">General benchmarks — thinking off; IFEval & GSM8K full, MMLU-Pro 40q per category</td></tr>
<tr><td>IFEval</td><td class="gs-best">90.2</td><td>89.8</td><td>89.8</td></tr>
<tr><td>GSM8K</td><td class="gs-best">97.0</td><td>96.1</td><td>96.7</td></tr>
<tr><td>MMLU-Pro</td><td class="gs-best">85.5</td><td>85.4</td><td>84.6</td></tr>
</table>
</div>
</div>
<div class="gs-section gs-section--journal">
<div class="gs-shead">
<span class="gs-snum">05</span>
<span class="gs-stitle">Creation Process</span>
</div>
<div class="gs-sbody">
<p>Creation Process: SFT > Merge > GRPO > GRPO > on-policy SFT</p>
<p><strong>Stage 1 — Diversity SFT.</strong> Stock Gemma 4 collapses hard on underspecified creative prompts ("Write a story." basically always gives clockmaker or memory related stories in a shop with Elias). Trained on ~4,000 short stories curated against the storyscope narrative prompts and found attractors. The dataset is a mix of human stories and synthetic stories from a set of frontier models, with diverse generation prompts swapped out for generic ones and filtered for quality. I also included some of the usual creative instruct and roleplay data. The model came out alright. Creative, but notably worse at instruction following with degraded intelligence. SLERP-merged back into the original instruct at t=0.5, which basically reverted it to stock Gemma 4 with slightly improved prose and creativity (similar to MeroMero).</p>
<p><strong>Stage 2 — Creative GRPO (with think disabled).</strong> TRL GRPO (via Axolotl), 8 rollouts per prompt on the same bare prompts. Reward stack: LLM-judge diversity and coherence rewards, an attractor-marker penalty seeded from stock and then updated with whatever started appearing as new attractors during training, narrative-rate penalties and deterministic degeneracy guards (checking for non-Latin characters, joined words etc). 300 steps.</p>
<p><strong>Stage 3 — RP logic GRPO (with think enabled).</strong> 100 further steps on multi-turn roleplay contexts: a thinking check to ensure it always parsed correctly, a logic-defect judge (DeepSeek-V4 Flash with a rubric), per-context attractor lists mined from k=8 baselines of the stage 2 model, and the same degeneracy checks as stage 2.</p>
<p><strong>Stage 4 — On-policy multi-outcome RP SFT.</strong> ~3,300 samples the model wrote itself on roleplay contexts, filtered to keep only varied continuations. The model wasn't able to produce diverse results purely on-policy, so a natural response was generated first, then each sample went through a GLM-5.2 critique pipeline: error detection, plus steering ideas injected as OOC commands for re-generation (DeepSeek-V4-Pro / GLM-5.2 alternating). Everything was then filtered for errors, slop and any degeneracy as usual. Roughly 60% of samples include thinking. Last turn only.</p>
<p>Trained using Axolotl.</p>
<details>
<summary>Stage 1 — Diversity SFT Config (Axolotl)</summary>
<div class="gs-detail-body">
<pre><code>base_model: google/gemma-4-31B-it
 
plugins:
- axolotl.integrations.cut_cross_entropy.CutCrossEntropyPlugin
- axolotl.integrations.liger.LigerPlugin
liger_layer_norm: true
liger_rope: true
liger_rms_norm: true
liger_glu_activation: true
liger_rms_norm_gated: true
strict: false
cut_cross_entropy: true
 
datasets:
- path: ./data/diversity_sft_masked.jsonl
val_set_size: 0
output_dir: ./G4-31B-SFT-v10-2
 
sequence_len: 8192
pad_to_sequence_len: true
sample_packing: true
 
adapter: lora
lora_r: 64
lora_alpha: 64
peft_use_rslora: true
lora_dropout: 0.0
freeze_mm_modules: true
lora_target_modules: 'model.language_model.layers.[\d]+.(_checkpoint_wrapped_module.)?(mlp|self_attn).(up|down|gate|q|k|v|o)_proj'
 
gradient_accumulation_steps: 1
micro_batch_size: 4
num_epochs: 2
optimizer: adamw_torch_fused
lr_scheduler: cosine
learning_rate: 1e-5
max_grad_norm: 1.0
warmup_ratio: 0.1
weight_decay: 0.05
saves_per_epoch: 2
 
bf16: auto
tf32: true
 
# FA2 not supported
sdp_attention: true
flash_attention: false
 
fsdp_config:
fsdp_version: 2
offload_params: false
cpu_ram_efficient_loading: false
auto_wrap_policy: TRANSFORMER_BASED_WRAP
transformer_layer_cls_to_wrap: Gemma4TextDecoderLayer
state_dict_type: FULL_STATE_DICT
sharding_strategy: FULL_SHARD
reshard_after_forward: true
activation_checkpointing: true</code></pre>
</div>
</details>
<details>
<summary>Stage 1 — Mergekit Config</summary>
<div class="gs-detail-body">
<pre><code>merge_method: slerp
base_model: google/gemma-4-31B-it
models:
- model: google/gemma-4-31B-it
- model: ApocalypseParty/G4-31B-SFT-v10-2
parameters:
t: 0.5
dtype: bfloat16</code></pre>
</div>
</details>
<details>
<summary>Stage 2 — Creative GRPO Config (Axolotl)</summary>
<div class="gs-detail-body">
<pre><code>base_model: /workspace/models/configCA # stage 1 output
 
rl: grpo
 
trl:
reward_funcs:
- rewards_g4.reward_judge_diversity
- rewards_g4.reward_judge_coherence
- rewards_g4.reward_attractor
- rewards_g4.reward_narrative
- rewards_g4.reward_sane
reward_weights: [3.0, 3.0, 0.75, 1.0, 1.0]
beta: 0.02
num_generations: 8
max_completion_length: 1600
temperature: 1.0
use_vllm: true
scale_rewards: true
loss_type: grpo
epsilon: 0.2
generation_kwargs:
stop_token_ids: [1, 106, 50]
top_k: 64
top_p: 0.95
 
datasets:
- path: /workspace/data/sft_train_final.jsonl
type: ebft_chat.transform
 
sequence_len: 2048
micro_batch_size: 2
gradient_accumulation_steps: 4
max_steps: 200
 
learning_rate: 4.0e-6
optimizer: adamw_torch_fused
lr_scheduler: cosine
warmup_steps: 10
weight_decay: 0.01
 
adapter: lora
lora_r: 64
lora_alpha: 64
peft_use_rslora: true
lora_dropout: 0.0
freeze_mm_modules: true
lora_target_modules: 'model.language_model.layers.[\d]+.(_checkpoint_wrapped_module.)?(mlp|self_attn).(up|down|gate|q|k|v|o)_proj'
 
max_grad_norm: 1.0
bf16: auto
tf32: true
sdp_attention: true
flash_attention: false
gradient_checkpointing: true
 
# shipped weights use checkpoint-100 of this run</code></pre>
</div>
</details>
<details>
<summary>Stage 3 — RP Logic GRPO Config (Axolotl)</summary>
<div class="gs-detail-body">
<pre><code>base_model: /workspace/models/r4b100 # stage 2 output
 
rl: grpo
 
trl:
reward_funcs:
- rewards_rp.reward_thinking # format gate on the think block
- rewards_rp.reward_logic # constraint-grounded defect judge
- rewards_rp.reward_attractor # frozen per-context lists from stock k=8
- rewards_rp.reward_sane # deterministic glitch guards
reward_weights: [2.0, 3.0, 1.0, 1.0]
beta: 0.02
num_generations: 8
max_completion_length: 2560
temperature: 1.0
use_vllm: true
scale_rewards: true
loss_type: grpo
epsilon: 0.2
generation_kwargs:
stop_token_ids: [1, 106, 50]
top_k: 64
top_p: 0.95
 
datasets:
- path: /workspace/rp/rp3_train.jsonl
type: ebft_chat.transform
 
sequence_len: 8192
micro_batch_size: 1
gradient_accumulation_steps: 8
max_steps: 100
 
learning_rate: 3.0e-6
optimizer: adamw_torch_fused
lr_scheduler: cosine
warmup_steps: 10
weight_decay: 0.01
 
adapter: lora
lora_r: 64
lora_alpha: 64
peft_use_rslora: true
lora_dropout: 0.0
freeze_mm_modules: true
lora_target_modules: 'model.language_model.layers.[\d]+.(_checkpoint_wrapped_module.)?(mlp|self_attn).(up|down|gate|q|k|v|o)_proj'
 
max_grad_norm: 1.0
bf16: auto
tf32: true
sdp_attention: true
flash_attention: false
gradient_checkpointing: true</code></pre>
</div>
</details>
<details>
<summary>Stage 4 — On-Policy Multi-Outcome SFT Config (Axolotl)</summary>
<div class="gs-detail-body">
<pre><code>base_model: ApocalypseParty/G4-31B-r4b100-GRPO-rp100 # stage 3 output
 
plugins:
- axolotl.integrations.cut_cross_entropy.CutCrossEntropyPlugin
- axolotl.integrations.liger.LigerPlugin
liger_layer_norm: true
liger_rope: true
liger_rms_norm: true
liger_glu_activation: true
liger_rms_norm_gated: true
strict: false
cut_cross_entropy: true
 
datasets:
- path: ./data/g4_onpolicy_rp_masked.jsonl
val_set_size: 0
output_dir: ./G4-31B-r4b100-GRPO-rp100-sft
 
sequence_len: 8192
pad_to_sequence_len: true
sample_packing: true
 
adapter: lora
lora_r: 64
lora_alpha: 64
peft_use_rslora: false
lora_dropout: 0.0
freeze_mm_modules: true
lora_target_modules: 'model.language_model.layers.[\d]+.(_checkpoint_wrapped_module.)?(mlp|self_attn).(up|down|gate|q|k|v|o)_proj'
 
gradient_accumulation_steps: 2
micro_batch_size: 1
num_epochs: 1
optimizer: adamw_torch_fused
lr_scheduler: cosine
learning_rate: 4e-5
max_grad_norm: 1.0
warmup_ratio: 0.1
weight_decay: 0.05
saves_per_epoch: 2
 
bf16: auto
tf32: true
 
# FA2 not supported
sdp_attention: true
flash_attention: false
 
fsdp_config:
fsdp_version: 2
offload_params: false
cpu_ram_efficient_loading: false
auto_wrap_policy: TRANSFORMER_BASED_WRAP
transformer_layer_cls_to_wrap: Gemma4TextDecoderLayer
state_dict_type: FULL_STATE_DICT
sharding_strategy: FULL_SHARD
reshard_after_forward: true
activation_checkpointing: true</code></pre>
</div>
</details>
</div>
</div>
</div>
</body>
</html>
- Type
- gemma4
- License
- apache-2.0
- Created
- Jul 31, 2026
- Updated
- Aug 3, 2026