AI Search Comparison

This comparison examines the search capabilities and filtering options available across major AI language model search APIs.

Comparison

OpenAI Web search - OpenAI API

• Filter domains: ✅ Available
• Filter date: Not supported However, prompt-based date filtering works effectively. Testing with GPT-5.1, GPT-5.2 and GPT-5.4 successfully returned news results matching the specified date criteria.
• Localize search results: ✅ Available "To refine search results based on geography, you can specify an approximate user location using country, city, region, and/or timezone."

Claude AI Search Web search tool - Anthropic

• Filter domains: ✅ Available
• Filter date: Not supported Date filtering is not available as an API parameter. Attempting to filter by date through prompting (tested on claude-sonnet-4-5-20250929 and claude-sonnet-4.6) was unreliable, often yielding no results or out-of-range articles.
• Localize search results: ✅ Available

Gemini + Enable Grounding with Google Search

• Filter domains: Not supported
• Filter date: Not supported
• Localize search results:

Gemini + Enable URL context feature

• Filter domains: ✅ Available. Can analyze up to 20 URLs per request as defined in prompt content
• Filter date: Not supported
• Localize search results:
• Comment: I tested AIStudio by restricting company news searches to 20 specified news websites. Despite this constraint, the results still included content from unrelated domains.

Perplexity Sonar [Last visited: 2026-01-21]

• Filter domains: ✅ Available. Supports maximum of 10 domains
• Filter date: ✅ Available While a time range can be specified via parameters (last_updated_after_filter, after_date, search_recency_filter), testing on sonar-pro model showed significant inconsistencies—publication dates of results frequently fell outside the specified range.
• Localize search results: ✅ Available

xAI Search Tools | xAI

• Filter domains: ✅ Available with three parameters
  1. Parameter: allowed_websites
  2. Parameter: excluded_websites
  3. Parameter: sources. You also can customize data sources including web, X search, news, and RSS feeds.
• Filter date: ✅ Available with from_date and to_date parameters. Testing on grok-4-1-fast showed minor inconsistencies—1 out of 4 news results had a date outside the specified range.
• Localize search results: ✅ Available with country parameter.