How to Prompt with AI for Free (or Almost Free)

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📝 Overview

Last updated: May 2026

Accessing cutting-edge AI doesn’t require a subscription. Between generous free tiers, OpenRouter’s 28+ free models, and open-source tools like OpenCode, you can build a powerful AI workflow for zero cost. This guide shows you how.

Free Web Chat Services (No Account Needed)

Keep multiple tabs open to compare responses and leverage each model’s strengths:

OpenRouter: 28+ Free Models via API

OpenRouter offers zero-cost API access to a rotating selection of free models. No credit card required — just sign up and get an API key.

Top Free Models (May 2026)

Limits: ~20 RPM, ~200 requests/day per model. Use openrouter/free as the model ID to auto-route to available free models.

Why OpenRouter for Free AI

• One API key for 28+ free models
• Drop-in replacement: OpenAI-compatible API — just change the base URL to https://openrouter.ai/api/v1
• Use with any tool: OpenCode, Cline, VS Code extensions, scripts
• Fallback routing: If one model hits rate limits, the router tries another

OpenCode: Open Source AI Coding Agent

OpenCode is an open-source AI coding agent that runs in your terminal, desktop, or IDE. It supports 75+ LLM providers including OpenRouter, local models via Ollama, GitHub Copilot, and ChatGPT Plus.

How to Use It for Free

Option 1: Free Models Included OpenCode bundles free model access — no API key needed to start. Run /connect in the TUI, select opencode, and head to opencode.ai/auth.

Option 2: OpenRouter Free Models Configure OpenRouter as a provider with free models:

{
  "provider": "openrouter",
  "model": "openrouter/free",
  "apiKey": "your-openrouter-key"
}

Option 3: GitHub Copilot (Existing Subscription) If you already have GitHub Copilot ($10/mo), you can use it with OpenCode — no additional AI license needed. Run /connect and select GitHub Copilot.

Option 4: Local Models via Ollama (Completely Free) Run models like Qwen3 8B, DeepSeek Coder 6.7B, or Llama 3 locally:

{
  "name": "Ollama (local)",
  "provider": "openai-compatible",
  "baseUrl": "http://localhost:11434/v1",
  "model": "qwen3:8b-16k"
}

Key Features

• Terminal-first TUI with Vim-like editor and session management
• Full agentic toolset: bash, file operations, grep, glob, LSP integration
• Subagent support: launch parallel agents for complex multi-step tasks
• MCP integration: extend with custom tools and servers
• Share links: share any session for debugging or reference

Free API Tiers (Pay-as-You-Go Limits)

The Smart Workflow: Plan with Big Models, Execute with Small Ones

The key insight: use premium models for planning (via free web interfaces), then feed the plan to budget models for execution.

1. Plan with Claude Sonnet 4.6, Gemini 2.5 Pro, or DeepSeek V4 Flash via their free web UIs
2. Ask it to “write a detailed task list with how-to’s and why’s”
3. Execute via OpenCode, Cline, or direct API using Qwen3 Coder, OpenRouter free models, or Ollama local models

This separates “brainpower” from “execution” — preserving expensive model intelligence for strategy while running routine work on free or cheap models.

Zero-Cost Development Stack

Summary

• Free web chats give you unlimited access to frontier models for planning and research
• OpenRouter provides 28+ free models via API — no credit card needed
• OpenCode is the best free coding agent — runs with OpenRouter, Ollama, or Copilot
• Plan-execute separation maximizes quality while minimizing cost

The AI landscape changes fast. Stay curious, keep exploring new free options, and never pay for what you can access for free.

Based on original concepts from wuu73.org. Updated May 2026.

Crepi il lupo! 🐺