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The AI landscape moves fast, and we’re keeping pace. Today we’re adding two impressive models to Chat-O: Google’s Gemini 3.1 Pro Preview and Z-AI’s GLM-5. Whether you’re a developer, researcher, or casual user, these models offer something valuable.

Quick Comparison: Gemini 3.1 Pro vs GLM-5

Feature Gemini 3.1 Pro Preview GLM-5
Provider Google Z-AI (Open Source)
Available Tiers Power Balanced & Power
Best For Complex reasoning, multimodal tasks Code generation, everyday tasks
Strength Advanced chain-of-thought Cost-to-performance ratio
Speed Moderate (thorough) Fast

Gemini 3.1 Pro Preview: Google’s Latest Flagship

Gemini 3.1 Pro Preview represents Google’s cutting-edge work in AI reasoning. Available exclusively in our Power tier, this model excels at tasks requiring deep thinking and analysis.

What Makes Gemini 3.1 Pro Special

  • Chain-of-thought reasoning - Breaks complex problems into logical steps, showing its work along the way
  • Multimodal understanding - Process text and images in the same conversation
  • Extended context - Handle longer documents and multi-turn conversations without losing track
  • Technical excellence - Particularly strong at coding, debugging, and technical explanations

When to Choose Gemini 3.1 Pro

User: "I have a race condition in my Go code. Here's the snippet..."

Gemini 3.1 Pro will analyze the code, identify the race condition, explain why it happens, and provide a corrected implementation with best practices.

Best use cases:

  • Complex debugging sessions
  • Architecture decisions
  • Learning new concepts with detailed explanations
  • Multi-step problem solving
  • Code review with reasoning

GLM-5: Open-Source Power at a Great Price

Z-AI’s GLM-5 is the latest open-source model gaining attention for its impressive performance-to-cost ratio. We’re offering it in both Balanced and Power tiers, giving you flexibility based on your needs.

Why GLM-5 Stands Out

  • Excellent value - High-quality outputs at lower cost
  • Fast responses - Optimized for quick inference
  • Strong coding - Great at code generation, completion, and explanation
  • Transparent - Open-source architecture audited by the community

When to Choose GLM-5

User: "Create a REST API endpoint in Node.js with authentication middleware"

GLM-5 delivers clean, production-ready code with clear structure and helpful comments.

Best use cases:

  • Quick code generation
  • API development
  • Prototyping and iteration
  • Everyday coding questions
  • Budget-conscious projects

Real-World Test: Side by Side

We tested both models with the same prompt to show their different approaches:

Prompt: “Explain the difference between SQL JOINs and provide examples for each type.”

Gemini 3.1 Pro Preview gave a comprehensive explanation with:

  • Detailed breakdown of INNER, LEFT, RIGHT, FULL, and CROSS JOINs
  • Visual ASCII diagrams showing data relationships
  • Performance considerations for each type
  • When to use each JOIN in practice

GLM-5 provided:

  • Clear, concise explanations
  • Practical SQL examples for each JOIN type
  • Quick reference table comparing them
  • Common use cases

Both were excellent - Gemini 3.1 Pro went deeper while GLM-5 got straight to practical application.

Which Model Should You Use?

Choose Gemini 3.1 Pro Preview if you:

  • Need thorough explanations and reasoning
  • Are working on complex problems
  • Want to understand why something works
  • Value depth over speed

Choose GLM-5 if you:

  • Need quick, practical answers
  • Are generating or debugging code
  • Want great value for everyday tasks
  • Prefer faster response times

Pro tip: Try both! Different models excel at different tasks. Many Chat-O users switch between models based on their current needs.

Available Now on Chat-O

Both models are live and ready to use:

  • Gemini 3.1 Pro Preview → Power tier
  • GLM-5 (Balanced) → Balanced tier
  • GLM-5 (Power) → Power tier

New to Chat-O? Sign up today and get 1,000 free credits to explore all our models, including these new additions.

Already a user? Select either model from the dropdown in any chat. No configuration needed.

The Chat-O Difference

These models join our growing library of 50+ AI models from leading providers:

  • OpenAI - GPT-5, GPT-5 Mini, O3, O4
  • Anthropic - Claude Sonnet 4.6, Claude Opus 4.6
  • Google - Gemini 3.1 Pro, Gemini 3 Flash
  • xAI - Grok 3 Beta, Grok Code Fast
  • DeepSeek - R1, V3.2
  • And many more…

One platform, all the models you need. No API keys to manage, no separate subscriptions.

Ready to try? Sign up free and start chatting with Gemini 3.1 Pro and GLM-5 today.