Echo Chat AI

Main Features

• Multi-Model Response Comparison: Send one message to see responses from multiple AI models at once.
• Automatic Chat Saving: User chats are saved automatically.
• Context Awareness: Logged-in users can enable context awareness for more coherent responses.

Models and Use Cases

The platform offers 20 models in total. Anonymous users have access to 2, while logged-in users can unlock all 20.

OpenAI

• GPT 4o: Math, coding, writing, image & voice tasks.
• GPT 4o Mini: Basic multimodal tasks (image, voice, text).
• GPT 4.1 series: Focuses on coding, debugging, mobile/real-time use cases.

Anthropic

• Claude Opus 4.0: Heavy research, deep Q&A, long document processing.
• Claude Sonnet 4.0: Balanced essays & code generation.
• Claude 3.5 series: Essay writing, simple coding, support bots, quick summaries, and chat.

Google

• Gemini 2.5 Pro: Math, science, research writing, web app coding, learning assistant.
• Gemini 2.5 Flash: Real-time chat, quick posting.

XAI

• Grok series: Covers fast responses, math, science, writing, programming, and reasoning.

DeepSeek

• DeepSeek R1: Legal, medical, or corporate document search & summarization.
• DeepSeek V3: In-depth research and compliance intelligence.

Perplexity

• Sonar Pro: Professional research, academic writing, analyst work.
• Sonar: Casual Q&A, fact-checking, light research.

Usage and Pricing

• Anonymous Users: Get 100 FREE credits, with access to 2 basic models (GPT 4o Mini, Gemini 2.5 Flash).
• Logged-in Users: Get 500 FREE credits, unlock all 20 models, and enable context awareness.
• Paid Model: Users can purchase more credits via the "Buy Credits" button, indicating a pay-as-you-go model.