Gemini 3.1 Pro

Model Overview

Gemini 3.1 Pro is Google DeepMind's top-tier model focused on extreme reasoning, vibe coding, and complex agent-based workflows, released on February 19, 2026. It is designed to bridge the gap between standard production models and highly specialized reasoning tiers. Featuring an expanded output limit and a customizable "thinking system," it represents a major leap in abstract reasoning and agentic reliability.

Capabilities

• Three-Tier Thinking System: Allows developers to set a reasoning level (Low, Medium, High) per request, balancing reasoning depth with output latency.
• Complex Workflow Orchestration: Highly optimized for real-world agentic workflows and multi-step tool use, supported by a dedicated custom tools endpoint.
• Expanded Output Context: Supports a 1M-token input context and an expansive 65,536-token output limit, ideal for generating or refactoring extensive code files.
• Deep Multimodal Reasoning: Seamlessly handles text, image, video, audio, and PDF inputs, integrating them into complex logic problems.

Example Use Cases

• Autonomous Software Engineering: Utilizing agentic tools and the massive output window to refactor large codefiles and build complex software architectures.
• Advanced Agentic Workflows: Powering multi-step autonomous agents that require custom tool use, bash execution, and reliable prioritization.
• Extreme Reasoning Tasks: Solving difficult abstract logic puzzles and complex scientific or mathematical problems using the "High" thinking level.

Performance & Benchmarks

Gemini 3.1 Pro marks a significant leap in reasoning capabilities over its predecessors:

• ARC-AGI-2 Benchmark: Achieved an impressive 77.1%, up from 31.1% in Gemini 3 Pro, demonstrating genuine reasoning rather than memorization.
• MCP Atlas Benchmark: Showed a 15 percentage point improvement in multi-step tool use, establishing its reliability as an agentic backbone.

Intended Use & Limitations

Gemini 3.1 Pro is intended for enterprise and developer workloads requiring deep reasoning, custom tool integration, and agentic orchestration. It provides a highly configurable reasoning process. While it serves as a powerful reasoning tool, the rapid pace of development means even newer models (like the 3.5 series) are continually emerging for specific use cases, though 3.1 Pro remains a staple for complex logic and extensive output generation.

About Google DeepMind

Google DeepMind is the AI research arm of Google, striving to build general AI systems that advance scientific discovery and tackle global challenges. As the developers behind the Gemini model ecosystem, they consistently set new standards for multimodal capabilities, reasoning, and agentic intelligence in the AI industry.