How to get picked for AI search by coding agents
Anthropic web search took 20% of 277 judged AI search sessions. What the numbers say a vendor in this category should do.
If you sell web search services, this page is the part of the market no dashboard shows you: what a coding agent does when a developer asks for AI search and never compares vendors.
The numbers come from 277 judged sessions with Claude Code, Codex and Cursor, spread across 12 realistic codebases, with every session read by a judge.
What coding agents choose for AI search
Across 277 judged sessions, Anthropic web search was chosen most often, in 20% of runs. Exa was second with 14%.
| # | Product | Runs won | Share |
|---|---|---|---|
| 1 | Anthropic web search | 56 | 20% |
| 2 | Exa | 38 | 14% |
| 3 | Brave Search API | 31 | 11% |
| 4 | Tavily | 21 | 8% |
| 5 | OpenAI web search | 16 | 6% |
| 6 | Firecrawl | 14 | 5% |
| 7 | Parallel | 13 | 5% |
| 8 | Built in-house (no product adopted) | 13 | 5% |
| 9 | NewsAPI.ai | 11 | 4% |
| 10 | Perplexity Sonar | 9 | 3% |
Full board, every run replayable: the AI search leaderboard.
What the shape of this category means
The leader takes only 20% of runs. This category is genuinely open and the ordering can be moved.
With the top product at 20%, AI search is decided in the moment, from what the agent reads and what it finds in the repository. Nothing is locked in, which is the best situation a vendor can be in and the one where the work pays fastest.
The order here is set by the quality of what an agent can read and by whether your product is already present in the codebase. Both are things you can change.
The agents do not agree with each other
In this category the three agents we ran put different products first.
| Agent | Runs | Picked most often |
|---|---|---|
| Claude Code | 92 | Anthropic web search (55) |
| Codex | 96 | Exa (22) |
| Cursor | 89 | Tavily (15) |
That split decides where a vendor spends. Codex ran a web search in 53% of decision runs and Claude Code in 1.6%, so the pages you publish are live in half of Codex's AI search sessions and almost none of Claude Code's. Taking Exa's position with Codex is a content problem. Taking Anthropic web search's with Claude Code is a repository problem.
Who is asking changes the answer
Every request in this experiment was written as a specific kind of person. In this category the leader changes with the person.
| Who is asking | Runs | Picked most often |
|---|---|---|
| Vibe coder | 44 | OpenAI web search |
| Junior developer | 117 | Anthropic web search |
| Senior engineer | 68 | Anthropic web search |
| Enterprise team | 48 | Brave Search API |
That is 3 different products winning AI search for 4 kinds of buyer, out of the same 277 sessions. Nobody here is winning AI search. They are each winning one kind of buyer.
If you sell to more than one of them, you need pages for each. See how to win the enterprise persona.
What you are really competing against
In 5% of runs the agent wrote the code itself rather than adopting a product. That is low enough that your competition is other vendors, but high enough to be worth watching.
Considered, and never chosen
Because the judge records every product an agent raised and not only the one it picked, this board also shows who kept reaching the shortlist and losing. In AI search the clearest case is SerpApi: on the table in 62 sessions, chosen in none.
| Product | Raised in | Chosen in |
|---|---|---|
| SerpApi | 62 sessions | 0 |
| Diffbot | 42 sessions | 0 |
| Serper | 37 sessions | 0 |
| You.com | 30 sessions | 0 |
| Bing Search API | 27 sessions | 0 |
Being rejected is a better position than being unknown, and a cheaper one to fix. The product is already in the agent's head and on the list. Whatever ended those 198 sessions is recorded in each transcript, one reason at a time.
What to do about it in AI search
- Treat the ordering as movable. The leader holds 20%, so agents are deliberating rather than defaulting, and the inputs they use can change the answer. This is the most winnable shape a category comes in.
- Pick which buyer you are for. The same AI search need written as a vibe coder landed on OpenAI web search, and written as an enterprise team landed on Brave Search API. Those are two markets, and the enterprise one needs pages containing the constraint words: audit log, data residency, retention, single sign-on. See how to win the enterprise persona.
- Measure per agent. Claude Code put Anthropic web search first, Codex put Exa first, Cursor put Tavily first. A blended number for AI search describes a market that does not exist.
The work that applies to every category rather than to this one is written up separately: audit your documentation, write a quickstart an agent can follow, and how to measure install share.
Every web search service on this board
One page per product, with its install share, the per-agent split, and how often it was raised without being chosen.
- Do coding agents recommend Anthropic web search? — chosen in 20% of sessions
- Do coding agents recommend Exa? — chosen in 14% of sessions
- Do coding agents recommend Brave Search API? — chosen in 11% of sessions
- Do coding agents recommend Tavily? — chosen in 8% of sessions
- Do coding agents recommend OpenAI web search? — chosen in 6% of sessions
- Do coding agents recommend Firecrawl? — chosen in 5% of sessions
- Do coding agents recommend Parallel? — chosen in 5% of sessions
- Do coding agents recommend NewsAPI.ai? — chosen in 4% of sessions
- Do coding agents recommend Perplexity Sonar? — chosen in 3% of sessions
- Do coding agents recommend SerpApi? — raised in 62 sessions, chosen in none
Where these numbers come from
277 judged sessions in AI search across 12 codebases, part of a published set of 7,025. Real coding agents at pinned versions, in sandboxes, inside realistic codebases, with a simulated project owner in the loop and a blind judge on every session. The full method is on one page: how we measured this.
Every AI search run can be replayed on the board.
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Common questions
How many codebases is this based on?
277 judged sessions across 12 realistic codebases. A category only runs on repositories where its seam is open, so coverage differs: some categories ran on more than ten codebases and some on two.
What web search service do coding agents choose?
Across 277 judged sessions, Anthropic web search was chosen most often, in 20% of runs. Exa was second with 14%. The result changes by agent and by who is asking.
Do Claude Code and Codex pick the same web search service?
No. Claude Code picked Anthropic web search, Codex picked Exa, Cursor picked Tavily. Measuring one agent tells you about part of the market only.
How often do agents build AI search themselves instead of installing something?
In 5% of runs the agent wrote the code itself rather than adopting a product.
How can a vendor improve its position here?
Make the quickstart run when pasted, state the current version on the documentation page, use one name across product, package and import, write pages for the symptoms users describe rather than only the category name, and get into the repository through templates and framework integrations.
Which web search services do agents consider but never choose?
SerpApi (raised in 62 sessions, chosen in none), Diffbot (raised in 42 sessions, chosen in none), Serper (raised in 37 sessions, chosen in none), You.com (raised in 30 sessions, chosen in none), Bing Search API (raised in 27 sessions, chosen in none). Being considered and not chosen is a different problem from being unknown, and it is usually fixable.
Where this comes from
Armature ran 7,025 judged sessions with Claude Code, Codex and Cursor inside 77 realistic codebases, and published every run. The numbers on this page come from that work.