AI Models
Explore 40+ AI models available in Billix
Billix gives you access to over 40 AI models from the world's leading AI companies. Each model has unique strengths, and understanding them helps you get better results.
Why Multiple Models?
Different AI models excel at different tasks:
- OpenAI models are great all-rounders with strong coding abilities
- Anthropic (Claude) models excel at nuanced writing and long documents
- Google models are fast and great with facts and research
- Open-source models offer good performance without premium costs
Instead of being locked into one AI, Billix lets you choose the best tool for each job.
Model Categories
Model Comparison
Compare models side-by-side to find the best fit
OpenAI Models
GPT-5, GPT-4o, o3, and more
Anthropic Models
Claude 4 Opus, Claude 4 Sonnet, Claude Haiku
Google Models
Gemini 2.5 Pro, Gemini Flash, Imagen
Open Source Models
Llama, Mistral, DeepSeek, and others
Model Settings
Configure temperature, tokens, and more
Quick Model Selection Guide
| Task | Recommended Model | Why |
|---|---|---|
| General questions | GPT-4o | Fast and accurate |
| Writing & content | Claude 4 Sonnet | Nuanced, natural tone |
| Coding | GPT-4.1 or Claude 4 Sonnet | Strong code understanding |
| Complex reasoning | GPT-5 or o3 | Advanced capabilities |
| Quick answers | GPT-4o Mini | Fast and efficient |
| Image understanding | Gemini 2.5 Pro | Excellent vision |
| Long documents | Claude 4 Opus | 200K+ context window |
| Creative writing | Claude 4 Opus | Creative and detailed |
Model Providers
OpenAI
Creator of the GPT series. Known for:
- Strong general capabilities
- Excellent coding assistance
- Fast response times
- Advanced reasoning (o3)
Anthropic
Creator of Claude. Known for:
- Thoughtful, nuanced responses
- Long context windows (200K tokens)
- Strong writing quality
- Safety-focused design
Creator of Gemini. Known for:
- Fast responses
- Multimodal capabilities (text + images)
- Good factual accuracy
- Research integration
Meta
Creator of Llama. Known for:
- Open-source availability
- Good performance/cost ratio
- Community improvements
- Deployment flexibility
Others
- Mistral - European AI company with efficient models
- DeepSeek - Strong coding and reasoning
- xAI (Grok) - Real-time information
- Qwen - Specialized coding models
How to Switch Models
- Click the model selector (near the input box)
- Browse or search for a model
- Click to select
- Your next message uses the new model
You can switch models mid-conversation. The new model sees your chat history and can continue where the previous model left off.
Credits and Costs
Models are grouped into tiers based on their capabilities:
| Tier | Credit Cost | Examples |
|---|---|---|
| Free | 0 credits | Some open-source models |
| Standard | 1 credit | GPT-4o Mini, Claude Haiku |
| Advanced | 5 credits | GPT-4o, Claude Sonnet |
| Premium | 20 credits | GPT-5, Claude Opus, o3 |
See How Credits Work for details.
Next Steps
- Compare models in the Model Comparison guide
- Learn about specific OpenAI models
- Explore model settings for fine-tuning
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