Get free models from OpenRouter as JSON

gistfile1.txt

#!/usr/bin/env -S deno run --allow-net

/**
 * Fetches all models from OpenRouter API and filters for free ones
 * Run with: deno run --allow-net openrouter-free-models.js
 */

async function getFreeOpenRouterModels() {
  try {
    console.log('Fetching models from OpenRouter...');
    
    const response = await fetch('https://openrouter.ai/api/v1/models', {
      headers: {
        'Content-Type': 'application/json',
      }
    });

    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }

    const data = await response.json();
    
    if (!data.data || !Array.isArray(data.data)) {
      throw new Error('Unexpected API response format');
    }

    console.log(`Total models found: ${data.data.length}`);

    // Filter for free models
    // Free models typically have pricing.prompt = "0" and pricing.completion = "0"
    const freeModels = data.data.filter(model => {
      const pricing = model.pricing;
      if (!pricing) return false;
      
      // Check if both prompt and completion pricing are "0" (free)
      const promptPrice = parseFloat(pricing.prompt || "0");
      const completionPrice = parseFloat(pricing.completion || "0");
      
      return promptPrice === 0 && completionPrice === 0;
    });

    console.log(`Free models found: ${freeModels.length}\n`);

    // Display the free models
    if (freeModels.length > 0) {
      console.log('📋 Free Models Available:');
      console.log('=' .repeat(50));
      
      freeModels.forEach((model, index) => {
        console.log(`${index + 1}. ${model.id}`);
        if (model.name && model.name !== model.id) {
          console.log(`   Name: ${model.name}`);
        }
        if (model.description) {
          console.log(`   Description: ${model.description}`);
        }
        if (model.context_length) {
          console.log(`   Context Length: ${model.context_length.toLocaleString()}`);
        }
        console.log('');
      });
    } else {
      console.log('No free models found.');
    }

    // Return the array for potential programmatic use
    return freeModels;

  } catch (error) {
    console.error('Error fetching models:', error.message);
    return [];
  }
}

// Run the function if this script is executed directly
if (import.meta.main) {
  const freeModels = await getFreeOpenRouterModels();
  
  // Optional: Save to JSON file
  const saveToFile = Deno.args.includes('--save');
  if (saveToFile) {
    try {
      await Deno.writeTextFile(
        'openrouter-free-models.json',
        JSON.stringify(freeModels, null, 2)
      );
      console.log('✅ Results saved to openrouter-free-models.json');
    } catch (error) {
      console.error('Failed to save file:', error.message);
    }
  }
}

// Export for use as a module
export { getFreeOpenRouterModels };