List all free models on openrouter.ai

get_free_models_on_openrouter.js

const https = require('https');

const options = {
  hostname: 'openrouter.ai',
  path: '/api/frontend/models/find?max_price=0&order=pricing-low-to-high&fmt=cards&output_modalities=text',
  method: 'GET',
  headers: {
    'accept': '*/*',
    'accept-language': 'zh-CN,zh-HK;q=0.9,zh-TW;q=0.8,zh;q=0.7,en;q=0.6',
    'cache-control': 'no-cache',
    'pragma': 'no-cache',
    'referer': 'https://openrouter.ai/models?max_price=0&order=pricing-low-to-high&fmt=cards&output_modalities=text',
    'sec-ch-ua': '"Chromium";v="148", "Microsoft Edge";v="148", "Not/A)Brand";v="99"',
    'sec-ch-ua-mobile': '?0',
    'sec-ch-ua-platform': '"macOS"',
    'sec-fetch-dest': 'empty',
    'sec-fetch-mode': 'cors',
    'sec-fetch-site': 'same-origin',
    'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 Edg/148.0.0.0'
  }
};

const req = https.request(options, (res) => {
  let data = '';

  res.on('data', (chunk) => {
    data += chunk;
  });

  res.on('end', () => {
    try {
      const response = JSON.parse(data);
      const models = response.data.models || [];

      if (process.argv.includes('--verbose')) {
        console.log(JSON.stringify(response, null, 2));
      }

      const result = models
        .map(model => ({
          model_name: model.name,
          model_slug: model.slug,
          description: model.description,
          free_slug: model.endpoint?.model_variant_slug,
          context_length: model.context_length,
          reasoning: model.supports_reasoning,
          is_free: model.endpoint?.is_free,
          _modalities: {
            input: model.input_modalities,
            output: model.output_modalities,
            has_text_output: model.has_text_output
          },
          supported_parameters: model.endpoint?.supported_parameters,
        }))
        .filter(v => v.is_free && v._modalities.has_text_output);

      if (process.argv.includes('--json')) {
        console.log(JSON.stringify(result, null, 2));
      } else {
        const tableData = result.map(m => ({
          name: m.model_name,
          free_slug: m.free_slug,
          context_length: m.context_length,
          reasoning: m.reasoning
        }));
        console.table(tableData);
      }
    } catch (e) {
      console.error('Error:', e.message);
    }
  });
});

req.on('error', (e) => {
  console.error(`Request Error: ${e.message}`);
});

req.end();

But you will know, free models are slow and have always reached their rate limits.