BlackMountain gives you access to leading AI models from OpenAI, Anthropic, Google, and Mistral in one unified interface. Each model has different strengths — selecting the right one improves the quality and efficiency of your work.
Available Models
BlackMountain supports the following AI models:
Provider | Models | Best for |
OpenAI | GPT-5.2, GPT-5 Mini, GPT-5 Nano | Complex reasoning, coding, creative work, general-purpose tasks |
Anthropic | Claude Opus 4.6, Claude Sonnet 4.5, Claude Haiku 4.5 | Long-form analysis, document review, nuanced conversations |
Gemini 2.5 Pro, Gemini 2.5 Flash, Gemini 2.5 Flash Lite | Multimodal tasks, data analysis, technical research | |
Mistral | Mistral Large 3, Mistral Medium 3.1, Mistral Small 3.2 | European alternative, multilingual tasks, cost-efficient processing |
Model availability may vary depending on your subscription plan. Contact your organization administrator if a specific model is unavailable.
How to Switch Models
You can change the model at any time — before or during a conversation:
Click the model selector dropdown in the input field
Select your desired model from the list
Continue your conversation — the new model has access to the full conversation history
Switching mid-conversation:
You can change models at any point. The new model will have access to the entire conversation history and can continue where the previous model left off.
Setting a Default Model
You can set a preferred default model that will be used for all new conversations:
Open Settings from the profile menu
Under Chat, select your preferred default model
All new conversations will use this model unless you change it
Model Details
OpenAI Models
OpenAI Models
GPT-5.2
Most capable OpenAI model for complex reasoning
Best for: Advanced problem-solving, code generation, image analysis, strategic planning
GPT-5 Mini
Fast and capable for everyday tasks
Best for: Content generation, quick Q&A, routine work
GPT-5 Nano
Fastest and most cost-effective
Best for: Simple tasks, high-volume processing, rapid prototyping
Anthropic Models
Anthropic Models
Claude Opus 4.6
Most capable model for nuanced, complex tasks
Best for: Complex document review, research synthesis, critical analysis
Claude Sonnet 4.5
Balanced speed and intelligence
Best for: Long-form content, detailed analysis, thoughtful conversations
Claude Haiku 4.5
Fast responses for simple tasks
Best for: Quick answers, routine work, high-volume tasks
Google Models
Google Models
Gemini 2.5 Pro
Advanced reasoning with thinking mode support
Best for: Complex data analysis, technical research, multi-step reasoning
Gemini 2.5 Flash
Fast, efficient responses
Best for: Quick multimodal tasks, real-time analysis, general-purpose work
Gemini 2.5 Flash Lite
Lightweight and cost-efficient
Best for: Simple queries, high-volume tasks, cost-conscious projects
Mistral Models
Mistral Models
Mistral Large 3
Most capable Mistral model
Best for: Complex multilingual work, tasks requiring European data residency
Mistral Medium 3.1
Balanced performance
Best for: Translation, content creation, general-purpose tasks
Mistral Small 3.2
Fast and lightweight
Best for: Summarization, lightweight processing, cost-efficient tasks
Choosing the Right Model
By Task Type
Task | Recommended Models |
Code generation & debugging | GPT-5.2, Claude Sonnet 4.5 |
Long document analysis | Claude Opus 4.6, Gemini 2.5 Pro |
Image + text analysis | GPT-5.2, Gemini 2.5 Flash |
Creative writing | GPT-5.2, Claude Sonnet 4.5 |
Data analysis | Gemini 2.5 Pro, GPT-5.2 |
Multilingual tasks | Mistral Large 3, GPT-5.2 |
Fast, routine tasks | GPT-5 Nano, Claude Haiku 4.5, Mistral Small 3.2 |
Complex reasoning | GPT-5.2, Claude Opus 4.6, Gemini 2.5 Pro |
Best Practices
Match the model to your task — Don't default to one model for everything. Use Claude Opus 4.6 for reviewing long contracts, GPT-5 Nano for drafting routine emails, and Gemini 2.5 Pro for analyzing large datasets.
Switch models if results aren't optimal — If a response doesn't meet your needs, try the same prompt with a different model. Each model has different strengths and response styles.
Consider cost vs. capability — Not every task requires the most powerful model. Use premium models (GPT-5.2, Claude Opus 4.6) for high-stakes work and efficient models (GPT-5 Nano, Claude Haiku 4.5, Mistral Small 3.2) for routine tasks.
Use thinking mode for complex problems — When working with multi-step reasoning or technical analysis, enable thinking mode on Gemini 2.5 Pro to see the model's reasoning process.
Next Steps
Starting a Conversation — Learn how to create a chat and send your first message
Web Search in Chat — Ground model responses in real-time information
Document Upload & Analysis — Analyze files and extract insights
Chat Functionalities — Edit messages, regenerate responses, and more
Need help choosing a model? Contact support or visit our FAQs & Troubleshooting.