OpenRouter or direct providers
Use one OpenRouter key across the full engine deck, or connect supported source-company APIs. Engines unavailable under the selected provider are clearly locked rather than failing silently.
Twenty-one AI engines. One command interface. Route work through OpenRouter or supported source-company APIs, keep projects organised locally, switch models without rebuilding your workflow, and listen to responses through your choice of professional text-to-speech provider.
Think Fox combines multiple providers with persistent conversations, reusable context, direct search, document handling, image generation, multi-provider text-to-speech, and branching workflows inside one browser-based interface.
Use one OpenRouter key across the full engine deck, or connect supported source-company APIs. Engines unavailable under the selected provider are clearly locked rather than failing silently.
Upload text, code, data files, or PDFs. Think Fox extracts readable content locally in the browser and attaches it to the relevant message without requiring a document server.
Use OpenRouter search or query Tavily, Brave Search, or a configured SearXNG instance. Results are added as labelled reference context before the engine responds.
Switch into image mode on supported OpenAI and Google routes. Generated images are rendered inline and stored with the conversation in the local Think Fox library.
Play assistant responses aloud using Deepgram, OpenAI, ElevenLabs, or MiniMax. Choose the provider, voice, model, speed, and output settings that suit the task, then control playback directly from each response.
Keep a user profile, pinned memories, reusable prompt templates, and reference documents. Context can be searched, categorised, backed up, and injected only when useful.
Edit a message without destroying what followed. Think Fox preserves the original path, creates a new branch, and lets you move through the conversation tree.
Each engine keeps its own callsign, colour, model mapping, capabilities, default parameters, and concise system prompt. Switch engines within the same conversation whenever the work changes.

Fast general reasoning, coding, drafting, image input, and everyday tasks.

Large-context general work with preserved reasoning, vision, and tools.

Deep reasoning, coding, and tool-assisted work for difficult multi-step problems.

Executive analysis, structured writing, coding, and agent workflows.

Sharp technical analysis, coding, agents, and multimodal input.

Rigorous technical reasoning, precise analysis, coding, and agents.

Large-context reasoning, coding, tools, and multimodal input.

Efficient reasoning, coding, multilingual work, and tool calling.

General reasoning, coding, tools, vision, files, and supported image generation.

High-end OpenAI reasoning, coding, multimodal work, files, and tool use.

Large-context multimodal reasoning, image understanding, files, audio, video, and supported image generation.

Nuanced reasoning, long-form writing, coding, images, and files.

Advanced reasoning, knowledge work, coding, images, and files.

Natural writing, precise analysis, coding, images, and files.

Deep multimodal reasoning, huge context, mixed media, and dense analysis.

Creative and unconventional reasoning with vision, files, and tool support.

Heavy reasoning, planning, and agent orchestration.

High-capacity open-model reasoning, creative work, and flexible voice.

Direct, creative open-model work with a compact general-purpose footprint.

Multilingual reasoning, vision, files, coding, and tools.

Specialist code generation, technical problem solving, and long-context engineering work.
OpenRouter mode exposes the complete twenty-one-engine deck through one account. Direct-provider mode uses the selected source-company API and automatically locks incompatible engines. Dagger and Harlequin remain OpenRouter-only.
Each provider adapter handles its own endpoint, authentication, request format, streaming events, usage data, and supported capabilities. Think Fox keeps the interface consistent while the routing layer deals with the differences underneath.
Shuriken
Katana
Tempest
Scythe
Hellblade
Typhoon
Cinder
Glaive
Citadel
Stronghold
Gargoyle
Orbit
Rocketship
Ancestral
Mudcake
Eight Ball
Neon
Harlequin
Dagger
Monolith
TridentDifferent models are good at different work. Think Fox makes switching deliberate, visible, and useful.One interface · twenty-one engines · your API routes
Bring an OpenRouter key for the complete twenty-one-engine deck, or connect supported direct-provider and text-to-speech accounts. Generate images, search the web, work with documents, and listen to responses aloud—all from the same interface. Keys and project data are stored locally in your browser, so use Think Fox on a trusted device.
Launch Think Fox →