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AI Model Features Compared (2026)

Compare 500+ AI models across vision, tool use, function calling, JSON mode, structured output, reasoning, streaming, and context windows. Claude Opus 5 (Adaptive Reasoning, Max Effort, Intelligence Index 60.7, $5/$25), Claude Opus 5 (Xhigh Effort, II 60.1), and Claude Fable 5 (II 59.9, $10/$50) lead today — check the matrix below for vision, 1M+ context, JSON mode, and reasoning support across every frontier model. Built for developers picking a model for chat, code, agents, image understanding, or long-document tasks. For hands-on rankings, see our live LLM benchmark leaderboard, AI model speed rankings, best coding plan subscriptions, GPQA/AIME/HLE reasoning comparison, and PinchBench real-world agent scores.

🖼️ Top 5 Vision / Image-Input Models

    🔧 Top 5 Tool Use / Function Calling Models

      📋 Top 5 JSON Mode / Structured Output Models

        🧠 Top 5 Reasoning / Chain-of-Thought Models

          📏 Top 5 Longest Context Window Models (500K+ tokens)

            Live data from OpenRouter + Artificial Analysis

            AI Model Features & Capabilities

            Compare 0 AI models across 14 features — vision, tool use, context windows, JSON mode, reasoning, and more. Find exactly which capabilities each model supports.

            Basics
            Input / Output Modalities
            Capabilities
            Output Control
            Sort:
            ModelContextMax Out$/M In
            Streaming
            Vision
            Audio
            Video
            File
            Image
            Tool
            JSON
            Reasoning
            Web
            Log
            Reproducible
            No models found matching your filters.
            Legend:✓ Supported✗ Not supported◐ Partial— Unknown

            Feature Availability Overview

            Streaming
            0/0
            Vision / Image Input
            0/0
            Audio Input
            0/0
            Video Input
            0/0
            File Upload
            0/0
            Image Generation
            0/0
            Tool Use / Function Calling
            0/0
            JSON / Structured Output
            0/0
            Reasoning / CoT
            0/0
            Web Search
            0/0
            Log Probabilities
            0/0
            Reproducible (Seed)
            0/0

            Frequently Asked Questions

            Which AI models support vision / image input?

            Most flagship models from OpenAI (GPT-5.4), Anthropic (Claude 4.6), and Google (Gemini 3) support image input. Check the Vision column in the matrix above for the full list.

            Which AI models support function calling / tool use?

            Function calling is widely supported by OpenAI, Anthropic, Google, and Mistral models. Look for the Tool Use column. Models with this feature can call external APIs and tools you define.

            What is the largest context window available?

            As of 2026, some models offer context windows of 1M+ tokens (Google Gemini, some OpenAI models). Larger context windows let you process entire codebases or long documents in a single request.

            Which models support structured JSON output?

            Most modern models support JSON mode or structured outputs. This ensures the model returns valid JSON matching your schema — essential for API integrations and data extraction tasks.

            Do all models support streaming?

            Nearly all major API models support streaming, which sends tokens as they are generated. This provides a much better user experience for chat applications with faster perceived response times.