Web Search / AI search engines for agents
Independent comparison · 2026

Best AI Search Engines for Agents (2026): Web Search API Benchmark

Best web search API by F1 in this benchmark: Parallel basic at 46.5%. Fastest search: SERP (RapidAPI), 2.93s (0.4% F1). Lowest recorded search price: TinyFish, $0.00 per 1,000 queries within its free-tier limits.

Choose the search engine behind an AI agent that plans several searches and combines the evidence. Compare 12 providers across 20 configurations, including Exa, Tavily, Brave, Parallel and Firecrawl, on the same questions.

Updated 20 September 2026. Last measured 14 September 2026.

AI search engines compared on multi-search quality

Mean F1 on 45 company-discovery questions with multiple constraints, using the same agent and search results. F1 balances precision and recall; it is distinct from percentage accuracy on a single-answer test. Prices are the benchmark-recorded rate basis, with the same configurations used for the quality results.

45 questions · 20 configurations · ordered by F1
RankProvider & configurationF1Mean search timeRecorded $ / 1,000 queriesMedian task timeMedian task costOfficial docs
1Parallel basicparallel-basicPOST /v1/search mode=basic46.5%19.77s$5.00mode=basic · 10 results67.63s$1.12Official docs ↗
2Exa deepexa-deepPOST /search type=deep45.4%44.68s$12.00type=deep89.50s$0.72Official docs ↗
3Parallel advancedparallel-advancedPOST /v1/search mode=advanced44.2%36.58s$5.00mode=advanced · 10 results83.43s$0.62Official docs ↗
4Exa instantexa-instantPOST /search type=instant43.3%6.21s$7.00type=instant · up to 10 results49.83s$0.65Official docs ↗
5Linkup fastlinkup-fastPOST /v1/search depth=fast41.1%17.52s$5.00depth=fast · searchResults64.20s$0.92Official docs ↗
6Tavily advancedtavily-advancedPOST /search search_depth=advanced41.1%46.58s$16.002 credits · $0.008 PAYG92.17s$1.03Official docs ↗
7Linkup standardlinkup-standardPOST /v1/search depth=standard40.6%25.10s$5.00depth=standard · searchResults72.29s$0.94Official docs ↗
8Youextraction_mode=highlightsPOST /v1/search38.6%7.72s$5.00highlights included in Web Search48.16s$0.97Official docs ↗
9Youextraction_mode=highlights · knowledge=corePOST /v1/search38.1%8.88s$5.00highlights · knowledge=core · same Web Search price assumption47.64s$0.90Official docs ↗
10Parallel fastparallel-fastPOST /v1/search mode=fast38.0%12.17s$1.00mode=fast · 10 results53.93s$0.46Official docs ↗
11Perplexitysearch_context_size=lowPOST /search37.8%14.11s$5.00Search API · POST /search48.94s$0.33Official docs ↗
12Tavily basictavily-basicPOST /search search_depth=basic36.5%20.09s$8.001 credit · $0.008 PAYG63.04s$0.61Official docs ↗
13Parallel turboparallel-turboPOST /v1/search mode=turbo34.7%5.08s$1.00mode=turbo · 10 results46.40s$0.42Official docs ↗
14Nimblesearch_depth=standard · full_content=false · focus=generalPOST /v2/search30.7%12.22s$5.00search_depth=standard · full_content=false52.97s$0.47Official docs ↗
15FirecrawlfirecrawlPOST /v2/search30.4%39.44s$5.002 credits / 10 results74.98s$0.28Official docs ↗
16Brave SearchbraveGET /res/v1/web/search28.0%7.60s$5.00Recorded search-request rate; see official terms.43.52s$0.27Official docs ↗
17TinyFishtinyfishGET api.search.tinyfish.ai26.6%27.34s$0.0030 req/min cap64.24s$0.21Official docs ↗
18Nimblesearch_depth=lite · full_content=false · focus=generalPOST /v2/search24.1%34.43s$1.10search_depth=lite · full_content=false67.17s$0.22Official docs ↗
19Seltzseltz-companiesPOST /v1/search scope=companies14.5%8.98s$5.00Recorded search-request rate; see official terms.55.16s$1.75Official docs ↗
20SERP (RapidAPI)serpGET google-search74.p.rapidapi.com0.4%2.93s$3.00Pro overage $0.003/request31.38s$0.10Official docs ↗

Choose the best web search API for your application

A search engine for agents is a source of evidence

Here, an AI search engine means a programmatic web search service that feeds an agent. Compare the API's returned evidence and the agent's resulting answer. Keep consumer chat products and model-generated answer services in their own evaluation, because those products combine retrieval with a different answering system.

How multi-search changes the buying decision

An agent may need to discover candidates, refine a query and check several constraints before answering. This board tests 45 company-discovery questions with the same agent and tool budget for each provider. F1 balances precision and recall across the returned company sets. A broader result set helps only when it contains the correct matches.

Compare search latency with complete-task latency

A quick search call can still lead to a long reasoning loop. The table therefore shows both mean search time and median task time, together with F1. Read the fastest result alongside its quality score. The agent uses returned search evidence in this board; a separate benchmark adds page scraping to measure that workflow.

Why AI search benchmark rankings differ

Use each benchmark to answer the question it measured. Openbenchmarks keeps factual-search accuracy, developer task completion and multi-search F1 separate. AIMultiple evaluates returned-result quality and relevance. Artificial Analysis combines several agent-search evaluations into its Search Index. Compare their methods and source results before treating a rank in one study as a rank in another.

Benchmark method and source data

Mean F1 on 45 company-discovery questions with multiple constraints, using the same agent and search results. F1 balances precision and recall; it is distinct from percentage accuracy on a single-answer test. Each row is one measured configuration. Missing measurements appear as a dash.

Open benchmark code ↗ · Public dataset sample ↗ · All benchmark methods →

Compare multi-search and search-plus-scrape results →

Other studies: AIMultiple's returned-result evaluation ↗ · Artificial Analysis Search Index methodology ↗. Their datasets and scoring differ from the F1 board above.

Common questions

Which AI search engine is best for agents?

Best web search API by F1 in this benchmark: Parallel basic at 46.5%. Fastest search: SERP (RapidAPI), 2.93s (0.4% F1). Lowest recorded search price: TinyFish, $0.00 per 1,000 queries within its free-tier limits.

Which benchmark does the main ranking use?

Mean F1 on 45 company-discovery questions with multiple constraints, using the same agent and search results. F1 balances precision and recall; it is distinct from percentage accuracy on a single-answer test.

What does the price per 1,000 queries include?

The recorded search endpoint's request price. Model-token spend, optional scraping and plan conditions are separate. For rows with task measurements, median task cost is shown in its own column. Check the linked provider terms for current pricing.

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