Enable LLMs to autonomously select and apply diverse reasoning strategies without prompt engineering. Trains models with diverse thought templates covering 50-500 distinct reasoning approaches, achieving 2-13% improvements over baseline prompting methods.
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Enable LLMs to autonomously select and apply diverse reasoning strategies without prompt engineering. Trains models with diverse thought templates covering 50-500 distinct reasoning approaches, achieving 2-13% improvements over baseline prompting methods.
Mixture of Reasonings: Teaching LLMs to Reason Independently
Current large language models depend heavily on prompt engineering. Chain-of-Thought prompting improves reasoning by 2-3%, but it requires task-specific design and must be retuned for different problem types. What if models could learn to recognize when to use step-by-step reasoning, when to use analogies, when to decompose problems, and when to use direct inference—all without explicit instructions?
MoR (Mixture of Reasonings) trains this capability directly into model parameters. Instead of relying on external prompts, it creates diverse reasoning templates covering dozens of strategies, pairs them with actual problems and correct answers, and fine-tunes the model to embed reasoning flexibility. The result: models that autonomously apply effective reasoning without external guidance, generalizing across diverse problem types.
Core Concept
The key insight is that effective reasoning isn't about finding the one best strategy—it's about having multiple strategies available and knowing when to apply each. MoR implements this through:
Diverse Reasoning Template Generation: Using GPT-4o to create 50-500 distinct reasoning chain templates that cover different cognitive approaches (step-by-step decomposition, analogy-based reasoning, constraint satisfaction, backward chaining, etc.)
Dataset Construction: Pairing each template with benchmark problems and filtering for correct responses, creating a supervised learning corpus that teaches when different strategies work
Embedded Reasoning: Fine-tuning models via SFT (Supervised Fine-Tuning) so reasoning patterns become part of the model's learned parameters rather than external prompts
This approach eliminates the gap between prompting (fast but task-specific) and in-context few-shot examples (general but expensive). Models learn reasoning at training time and apply it flexibly at inference.
Architecture Overview
The MoR training pipeline consists of these components:
Template Filtering: Validation that templates produce correct answers on benchmark datasets
SFT Dataset Construction: Pairing problem instances with diverse templates and correct outputs
Fine-tuning Pipeline: LoRA or full fine-tuning on the template-augmented corpus
Inference Mechanism: Model generates reasoning automatically; no external prompt required
Multi-task Evaluation: Testing across math, QA, reasoning tasks to verify generalization
Implementation
This section demonstrates how to implement Mixture of Reasonings for your models.
Step 1: Generate diverse reasoning templates using GPT-4o
This code creates multiple reasoning strategies for a problem type:
import openai
import json
from typing importListdefgenerate_reasoning_templates(problem_type: str, num_templates: int = 100) -> List[str]:
"""
Use GPT-4o to generate diverse reasoning templates for a problem type.
Each template represents a different cognitive strategy.
"""
template_prompt = f"""You are an expert in reasoning strategies. For {problem_type} problems, generate {num_templates} diverse reasoning approaches that could solve such problems. Each approach should:
1. Use a different cognitive strategy (e.g., step-by-step decomposition, analogical reasoning, backward chaining, constraint satisfaction, simulation-based reasoning, etc.)
2. Be distinctive from the others
3. Be explicit enough to guide a language model
4. Cover both simple and complex problem-solving strategies
Format each as a reasoning template that starts with a prompt fragment like:
- "Let's break this into steps..."
- "I can think of a similar problem..."
- "Let me work backwards from the answer..."
- "The constraints are..."
- "I can visualize this situation..."
Output only the templates, one per line, starting with the strategy name in brackets."""
templates = []
# Use GPT-4o with longer context for diverse output
response = openai.ChatCompletion.create(
model="gpt-4o",
messages=[{"role": "user", "content": template_prompt}],
temperature=0.9, # Higher temperature for diversity
max_tokens=3000
)
raw_templates = response.choices[0].message.content.split('\n')
templates = [t.strip() for t in raw_templates if t.strip() andlen(t) > 10]
return templates[:num_templates] # Return requested count# Generate templates for math reasoning
math_templates = generate_reasoning_templates("arithmetic and algebra problems", num_templates=150)
print(f"Generated {len(math_templates)} math reasoning templates")
for template in math_templates[:5]:
print(f" - {template[:80]}...")
This generates diverse reasoning strategies using GPT-4o's creative capabilities.
Step 2: Create SFT dataset by pairing templates with problems and answers
This code constructs training data with diverse reasoning paths:
import random
from datasets import load_dataset
defcreate_mixture_sft_dataset(template_strategies: List[str], benchmark_dataset, max_samples=10000):
"""
Create SFT training data by pairing reasoning templates with problems.
Each problem is solved using multiple templates; we keep only correct solutions.
"""
sft_examples = []
for idx, problem inenumerate(benchmark_dataset):
if idx >= max_samples:
break
question = problem.get('question', problem.get('text', ''))
answer = problem.get('answer', problem.get('label', ''))
# Try multiple reasoning templates for this problemfor template in random.sample(template_strategies, min(5, len(template_strategies))):
# Use GPT-4o to execute this reasoning template on this problem
reasoning_prompt = f"""{template}
Problem: {question}
Think step by step and provide the answer."""
reasoning_response = openai.ChatCompletion.create(
model="gpt-4o",
messages=[{"role": "user", "content": reasoning_prompt}],
temperature=0.7,
max_tokens=500
)
predicted = reasoning_response.choices[0].message.content
# Validate: is this response correct?
validation_prompt = f"""Is this response correct for the problem?
Problem: {question}
Expected answer: {answer}
Predicted response: {predicted}
Respond with "CORRECT" or "INCORRECT"."""
validation = openai.ChatCompletion.create(
model="gpt-4o",
messages=[{"role": "user", "content": validation_prompt}],
max_tokens=20
)
is_correct = "CORRECT"in validation.choices[0].message.content.upper()
# Add to dataset only if correct (supervised learning of good reasoning)if is_correct:
sft_examples.append({
'instruction': question,
'reasoning_template': template,
'reasoning_chain': predicted,
'answer': answer
})
return sft_examples
# Create dataset
benchmark = load_dataset("math_qa", split="train")
sft_data = create_mixture_sft_dataset(math_templates, benchmark, max_samples=5000)
print(f"Created {len(sft_data)} SFT examples with diverse reasoning")
# Save for fine-tuningimport json
withopen("mixture_of_reasonings_sft.json", 'w') as f:
json.dump(sft_data, f)
This creates a training dataset where each problem has multiple correct reasoning paths.
Step 3: Fine-tune model with LoRA on reasoning diversity
This code adapts a base model to learn diverse reasoning strategies:
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer
from peft import LoraConfig, get_peft_model
import json
# Load base model
model_name = "meta-llama/Llama-2-7b"
model = AutoModelForCausalLM.from_pretrained(model_name, torch_dtype=torch.bfloat16)
tokenizer = AutoTokenizer.from_pretrained(model_name)
# Configure LoRA for efficient fine-tuning
lora_config = LoraConfig(
r=16,
lora_alpha=32,
lora_dropout=0.1,
target_modules=["q_proj", "v_proj", "k_proj"],
task_type="CAUSAL_LM"
)
model = get_peft_model(model, lora_config)
classMixtureReasoningSFTDataset(torch.utils.data.Dataset):
def__init__(self, data_path, tokenizer, max_length=512):
withopen(data_path) as f:
self.data = json.load(f)
self.tokenizer = tokenizer
self.max_length = max_length
def__len__(self):
returnlen(self.data)
def__getitem__(self, idx):
example = self.data[idx]
# Construct training text: problem + reasoning_chain + answer# This teaches the model to generate reasoning followed by answer
text = f"""Question: {example['instruction']}
Reasoning: {example['reasoning_chain']}
Answer: {example['answer']}"""# Tokenize
tokens = self.tokenizer(
text,
max_length=self.max_length,
truncation=True,
return_tensors="pt"
)
return {
'input_ids': tokens['input_ids'].squeeze(),
'attention_mask': tokens['attention_mask'].squeeze()
}
# Create dataset and dataloader
dataset = MixtureReasoningSFTDataset("mixture_of_reasonings_sft.json", tokenizer)
dataloader = torch.utils.data.DataLoader(dataset, batch_size=8, shuffle=True)
# Fine-tuning loop
optimizer = torch.optim.AdamW(model.parameters(), lr=2e-4)
model.train()
num_epochs = 3for epoch inrange(num_epochs):
total_loss = 0for batch_idx, batch inenumerate(dataloader):
input_ids = batch['input_ids'].to(model.device)
attention_mask = batch['attention_mask'].to(model.device)
# Forward pass
outputs = model(
input_ids=input_ids,
attention_mask=attention_mask,
labels=input_ids
)
loss = outputs.loss
total_loss += loss.item()
# Backward pass
loss.backward()
optimizer.step()
optimizer.zero_grad()
if (batch_idx + 1) % 100 == 0:
print(f"Epoch {epoch}, Batch {batch_idx}, Loss: {loss.item():.4f}")
print(f"Epoch {epoch} complete. Avg loss: {total_loss / len(dataloader):.4f}")
print("Fine-tuning complete!")
This adapts the model to learn diverse reasoning strategies through supervised fine-tuning.
Step 4: Evaluate reasoning capability across diverse tasks
This code tests whether the model generalizes reasoning across problem types:
defevaluate_reasoning_generalization(model, tokenizer, test_datasets=['math_qa', 'arc', 'commonsenseqa']):
"""
Evaluate whether MoR-trained model generalizes reasoning across different task types.
"""
results = {}
for dataset_name in test_datasets:
if dataset_name == 'math_qa':
test_data = load_dataset("math_qa", split="test")
elif dataset_name == 'arc':
test_data = load_dataset("arc", split="test")
elif dataset_name == 'commonsenseqa':
test_data = load_dataset("commonsenseqa", split="test")
else:
continue
correct = 0
total = min(len(test_data), 200) # Test on first 200 examplesfor idx, example inenumerate(test_data):
if idx >= total:
break
question = example.get('question', example.get('text', ''))
# Model generates reasoning and answer autonomously (no external prompt)
prompt = f"Question: {question}\n\nAnswer:"
inputs = tokenizer(prompt, return_tensors="pt")
with torch.no_grad():
outputs = model.generate(
inputs['input_ids'].to(model.device),
max_new_tokens=200,
temperature=0.7,
top_p=0.95
)
predicted = tokenizer.decode(outputs[0], skip_special_tokens=True)
# Extract answer from generated text (simplified; real implementation parses)
expected_answer = example.get('answer', example.get('answerKey', ''))
if expected_answer.lower() in predicted.lower():
correct += 1
accuracy = correct / total
results[dataset_name] = accuracy
print(f"{dataset_name}: {accuracy:.2%} accuracy ({correct}/{total})")
return results
# Evaluate on diverse tasks
results = evaluate_reasoning_generalization(model, tokenizer)
print(f"\nAverage accuracy across tasks: {sum(results.values()) / len(results):.2%}")
This evaluates whether reasoning learned on one task transfers to others.
Practical Guidance
When to use Mixture of Reasonings:
Fine-tuning language models where diverse problem-solving is needed
Tasks where chain-of-thought prompting helps but requires constant tuning
Applications across multiple problem types where generalization matters
Scenarios where inference-time prompt engineering is impractical
Models where embedding reasoning patterns is feasible (not resource-constrained inference)
When NOT to use:
Simple classification tasks without reasoning requirements
Real-time systems with strict latency constraints (fine-tuning adds overhead)
Tasks where single, deterministic strategies are optimal
Very large models where LoRA fine-tuning becomes expensive
Domains with limited labeled reasoning data (need sufficient training examples)
Hyperparameters and Configuration:
Parameter
Recommended
Notes
Number of Templates
150-500
More templates → more diversity; diminishing returns after 300
LoRA Rank
16-32
Higher for more capacity; 16 sufficient for reasoning specialization
Learning Rate
2e-4
Standard for LLM fine-tuning; reduce if diverging
Epochs
3-5
Reasoning requires fewer epochs than general language modeling
Batch Size
8-16
Diversity of reasoning paths benefits from smaller batches
Max Sequence Length
512-1024
Sufficient for problem + reasoning chain + answer
Template per Problem
3-5
Balances diversity with dataset size
Common Pitfalls:
Using too few templates—don't cover diverse strategies
Not filtering incorrect reasoning chains—teaches bad patterns
Fine-tuning on single task only—doesn't generalize to new domains
Using generic templates—must be specific enough to guide reasoning
Forgetting to test on out-of-distribution tasks—evaluate true generalization
Overtraining on templates—causes overfitting to specific phrasings
Key Design Decisions:
MoR separates template generation (done via GPT-4o, captures human reasoning diversity) from fine-tuning (adapts base model to leverage templates). This hybrid approach combines the creativity of larger models with the efficiency of smaller fine-tuned models. Templates are created once, reused across many problems, and validated before training—ensuring that models learn genuine reasoning patterns, not artifacts. By embedding reasoning into parameters rather than prompts, inference becomes parameter-efficient and generalizable.
Reference
Li, X., Yu, Z., Wang, J., Zhang, Z., Zhang, Y., & Sun, Y. (2025). Mixture of Reasonings: Teach Large Language Models to Reason with Adaptive Strategies. arXiv preprint arXiv:2507.00606. https://arxiv.org/abs/2507.00606
