What are the best free or low-cost AI models for OpenClaw?

Clawpedia · For Humans

Budget-friendly AI model recommendations for OpenClaw that deliver great performance without high API costs.

What Are the Best Free or Low-Cost AI Models for OpenClaw?

Running OpenClaw doesn't have to be expensive. There are excellent free and budget-friendly AI models that deliver impressive performance — from fully local models that cost nothing beyond electricity to cloud APIs with generous free tiers.

Completely Free: Local Models via Ollama

The most cost-effective option is running models locally. Once downloaded, these models run entirely on your hardware with zero ongoing costs.


# Install Ollama (one-time)
curl -fsSL https://ollama.ai/install.sh | sh

# Download free models
ollama pull llama3.1:8b        # Best all-around free model
ollama pull mistral:7b          # Fast and capable
ollama pull phi3:mini            # Smallest, runs on weak hardware
ollama pull gemma2:9b            # Google's open model

Top Free Local Models Ranked

ModelSizeRAM NeededQualitySpeedBest For
Llama 3.1 8B4.7 GB8 GB★★★★FastGeneral assistant
Mistral 7B4.1 GB8 GB★★★½Very fastQuick responses
Gemma 2 9B5.4 GB10 GB★★★★FastReasoning tasks
Phi-3 Mini2.3 GB4 GB★★★Very fastLow-resource devices
Qwen 2.5 7B4.4 GB8 GB★★★★FastMultilingual

Configuration for Free Local Use


# ~/.openclaw/config.yaml — Zero-cost setup
model:
  provider: ollama
  model: llama3.1:8b
  endpoint: http://localhost:11434
  temperature: 0.7
  max_tokens: 2048
  # No API key needed. No monthly fees. No data leaves your machine.

Budget Cloud Options

Llama 3.1 70B40 GB64 GB★★★★★SlowMaximum quality (if you have the hardware)

If local hardware isn't powerful enough, these cloud providers offer the best value:

ProviderFree TierCheapest PaidBest Budget Model
Google AI Studio60 requests/min (Gemini Flash)$0.075/1M tokensGemini 2.5 Flash
Groq30 req/min freePay-as-you-goLlama 3.1 70B (fast!)
OpenRouterSome free modelsFrom $0.06/1M tokensVarious
Together AI$5 free credit$0.20/1M tokensLlama 3.1
Mistral AILimited free tier$0.15/1M tokensMistral Small

Groq: Free and Ultra-Fast

OpenAINone$0.15/1M tokens (GPT-3.5)GPT-3.5 Turbo

Groq offers free access to open-source models with incredibly fast inference:


model:
  provider: groq
  model: llama-3.1-70b-versatile
  api_key: ${GROQ_API_KEY}    # Free to obtain
  # 30 requests/minute on free tier

Cost Estimation: Monthly Spend

Usage LevelMessages/DayLocal (Ollama)Groq FreeOpenAI GPT-3.5OpenAI GPT-4o
Light10–20$0$0~$0.50~$3
Moderate50–100$0$0~$2~$15
Heavy200+$0$0*~$8~$50

*Free tier limits may require queuing during peak hours.

The Sweet Spot: Hybrid Approach

Use a free local model for everyday tasks and route complex questions to a cloud model:


model:
  default:
    provider: ollama
    model: llama3.1:8b          # Free for 90% of queries
  
  fallback:
    provider: groq
    model: llama-3.1-70b-versatile  # Free cloud backup
    trigger: "needs_more_reasoning"

Quantized Models: More Power, Less RAM

Quantization compresses models to run on weaker hardware with minimal quality loss:


# Q4 quantization: ~50% smaller, ~95% quality
ollama pull llama3.1:8b-q4_K_M      # 4.9 GB instead of 8 GB
ollama pull llama3.1:70b-q4_K_M     # 40 GB instead of 70 GB
QuantizationSize ReductionQuality LossBest For
Q8~20% smallerNegligibleMaximum quality
Q5~40% smallerVery slightGood balance
Q4~50% smallerSlightLimited RAM
Q3~60% smallerNoticeableVery limited hardware

Recommendation: Start with Llama 3.1 8B locally via Ollama. It's free, private, and surprisingly capable. If you need better quality, add Groq as a free cloud fallback. You can run a powerful AI assistant for $0/month.

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