AI agent framework engine breadth

As of

All 16 companies by engine breadth

LangGraph / Deep Agents leads at 3 engines; the middle of the board sits at 2.

Ahead of second place: 0
Held by the top three: 35%
Middle of the board: 2
Below half the leader: 7 of 16

Rank, name and engine breadthMiddle 2

1LangGraph / Deep Agents3 engines
2CrewAI3 engines
3LlamaIndex3 engines
4Pydantic AI3 engines
5Mastra2 engines
6Microsoft Agent Framework2 engines
7Haystack2 engines
8Vercel AI SDK2 engines
9Google Agent Development Kit2 engines
10DSPy1 engines
11OpenAI Agents SDK1 engines
12Hugging Face smolagents1 engines
13Strands Agents1 engines
14Agno0 engines
15BeeAI Framework0 engines
16Claude Agent SDK0 engines

The prompt boards are re-run in rotation, about one category a day, so each board refreshes every few weeks and shows the date of its snapshot.

3 checks behind each row · 100% confidence across rows.

Agent Frameworks engine breadth current rankings
Rank	Name	Engine breadth	Mention coverage	Share of names	Cited as source	Change	Why
01	LangGraph / Deep Agents	3 engines	36.11% · 13 / 36	25.49% · 13 / 51	36.36% · 12 / 33		This rank My rank
02	CrewAI	3 engines	22.22% · 8 / 36	15.69% · 8 / 51	0% · 0 / 33		This rank My rank
03	LlamaIndex	3 engines	11.11% · 4 / 36	7.84% · 4 / 51	3.03% · 1 / 33		This rank My rank
04	Pydantic AI	3 engines	8.33% · 3 / 36	5.88% · 3 / 51	6.06% · 2 / 33	3	This rank My rank
05	Mastra	2 engines	16.67% · 6 / 36	11.76% · 6 / 51	12.12% · 4 / 33	1	This rank My rank
06	Microsoft Agent Framework	2 engines	13.89% · 5 / 36	9.8% · 5 / 51	18.18% · 6 / 33	2	This rank My rank
07	Haystack	2 engines	11.11% · 4 / 36	7.84% · 4 / 51	0% · 0 / 33	3	This rank My rank
08	Vercel AI SDK	2 engines	5.56% · 2 / 36	3.92% · 2 / 51	18.18% · 6 / 33	3	This rank My rank
09	Google Agent Development Kit	2 engines	5.56% · 2 / 36	3.92% · 2 / 51	6.06% · 2 / 33	1	This rank My rank
10	DSPy	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	2	This rank My rank
11	OpenAI Agents SDK	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	2	This rank My rank
12	Hugging Face smolagents	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	1	This rank My rank
13	Strands Agents	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	3	This rank My rank
14	Agno	0 engines	0% · 0 / 36	0% · 0 / 51	0% · 0 / 33	1	This rank My rank
15	BeeAI Framework	0 engines	0% · 0 / 36	0% · 0 / 51	0% · 0 / 33	1	This rank My rank
16	Claude Agent SDK	0 engines	0% · 0 / 36	0% · 0 / 51	0% · 0 / 33	1	Showing My rank

3 checks behind each row · 100% confidence across rows.

Agent Frameworks engine breadth current rankings
Rank	Name	Engine breadth	Mention coverage	Share of names	Cited as source	Change	Why
01	LangGraph / Deep Agents	3 engines	36.11% · 13 / 36	25.49% · 13 / 51	36.36% · 12 / 33		This rank My rank
02	CrewAI	3 engines	22.22% · 8 / 36	15.69% · 8 / 51	0% · 0 / 33		This rank My rank
03	LlamaIndex	3 engines	11.11% · 4 / 36	7.84% · 4 / 51	3.03% · 1 / 33		This rank My rank
04	Pydantic AI	3 engines	8.33% · 3 / 36	5.88% · 3 / 51	6.06% · 2 / 33	3	This rank My rank
05	Mastra	2 engines	16.67% · 6 / 36	11.76% · 6 / 51	12.12% · 4 / 33	1	This rank My rank
06	Microsoft Agent Framework	2 engines	13.89% · 5 / 36	9.8% · 5 / 51	18.18% · 6 / 33	2	This rank My rank
07	Haystack	2 engines	11.11% · 4 / 36	7.84% · 4 / 51	0% · 0 / 33	3	This rank My rank
08	Vercel AI SDK	2 engines	5.56% · 2 / 36	3.92% · 2 / 51	18.18% · 6 / 33	3	This rank My rank
09	Google Agent Development Kit	2 engines	5.56% · 2 / 36	3.92% · 2 / 51	6.06% · 2 / 33	1	This rank My rank
10	DSPy	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	2	This rank My rank
11	OpenAI Agents SDK	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	2	This rank My rank
12	Hugging Face smolagents	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	1	This rank My rank
13	Strands Agents	1 engines	2.78% · 1 / 36	1.96% · 1 / 51	0% · 0 / 33	3	This rank My rank
14	Agno	0 engines	0% · 0 / 36	0% · 0 / 51	0% · 0 / 33	1	This rank My rank
15	BeeAI Framework	0 engines	0% · 0 / 36	0% · 0 / 51	0% · 0 / 33	1	This rank My rank
16	Claude Agent SDK	0 engines	0% · 0 / 36	0% · 0 / 51	0% · 0 / 33	1	Showing My rank

Primary brandQuestion typeModel APIQuestion contains

Run a question live

36.1%

of these answers name or cite LangGraph / Deep Agents

13 of 36 answers

72.2%

Its share of the compared brands' appearances

10

Answers citing its own site

12 links to its domains

3 of 3

Model APIs that name it

The compared brands across the filtered answers
Brand	Named or cited	Against primary	Share of compared	Mentions	Answers citing it	Links to its site	Model APIs
LangGraph / Deep Agentslangchain.com	36.1%13 of 36	Primary	72.2%	22	10	12	3 of 3
LlamaIndexllamaindex.ai	11.1%4 of 36	-25.0 pts	22.2%	12	1	1	3 of 3
OpenAI Agents SDKopenai.com	2.8%1 of 36	-33.3 pts	5.6%	1	0	0	1 of 3
Claude Agent SDKanthropic.com	0.0%0 of 36	-36.1 pts	0.0%	0	0	0	0 of 3

Compared brands named in each answer, by question and model API
Question	OpenAIopenai/gpt-4o-mini	Anthropicanthropic/claude-haiku-4-5	Geminigoogle/gemini-2.5-flash
01What are the best open-source frameworks for building reliable AI agents in a production application?Recommendation	LangGraph / Deep Agents, cited 1 4 sources`f736fd64`	None named 0 sources`a6011974`	LangGraph / Deep Agents, cited 1OpenAI Agents SDK 6 sources`30488435`
02Recommend a Python-first agent framework with typed dependencies, structured outputs, tool validation, and testability.Recommendation	None named 6 sources`0a93806d`	LangGraph / Deep Agents 5 sources`c99bde45`	None named 5 sources`8ec5300a`
03Which TypeScript toolkit is best for streaming agent interfaces, tool calling, structured data, and multiple model providers?Recommendation	None named 8 sources`dda87429`	None named 0 sources`f09a530c`	None named 7 sources`aedcdcf7`
04Recommend a framework for role-based multi-agent teams, explicit handoffs, delegation, and human approval steps.Recommendation	None named 8 sources`6b63d488`	None named 0 sources`84227f68`	LangGraph / Deep Agents, cited 1 8 sources`23fecae1`
05What is the best framework for durable stateful agent graphs with checkpointing, retries, memory, and human-in-the-loop control?Recommendation	LangGraph / Deep Agents, cited 3 9 sources`bab619ea`	LangGraph / Deep Agents 0 sources`53e4b182`	LangGraph / Deep Agents 9 sources`3064d4a5`
06Which enterprise agent framework is strongest for .NET or Java teams that need plugins, governance, telemetry, and orchestration?Recommendation	None named 5 sources`41aa6e2b`	None named 0 sources`08ecea2f`	None named 9 sources`56d2c0fe`
07Recommend a cloud-native agent development framework with managed deployment, identity, security controls, and model flexibility.Recommendation	LangGraph / Deep Agents, cited 1 5 sources`57eaa9d0`	None named 0 sources`53fb8a40`	None named 7 sources`65dc78f4`
08Which agent framework is best for retrieval-heavy applications that use documents, data connectors, indexes, and citations?Recommendation	LlamaIndex 4 sources`3ee715c7`	LlamaIndex, cited 1 3 sources`a818595e`	LangGraph / Deep Agents, cited 1LlamaIndex 5 sources`04c14517`
09How should a team compare AI agent frameworks for abstraction overhead, model portability, lock-in, and debugging complexity?Commercial comparison	LangGraph / Deep Agents, cited 1 9 sources`9baa4355`	None named 0 sources`506d6fd4`	LangGraph / Deep Agents, cited 1LlamaIndex 6 sources`4d209a67`
10Which reliability criteria matter when choosing an agent framework, including state, retries, tracing, and deterministic tests?Commercial comparison	None named 8 sources`ad62cdcd`	None named 0 sources`d2bffe8a`	LangGraph / Deep Agents, cited 1 6 sources`2b425631`
11When should an engineering team adopt an agent framework instead of building a tool-calling loop directly on a model API?Commercial comparison	LangGraph / Deep Agents, cited 1 7 sources`06b2ca23`	None named 0 sources`dd1d48fe`	None named 6 sources`548af730`
12How should a company evaluate maintainer commitment, licensing, release stability, and migration risk in an agent framework?Commercial comparison	None named 4 sources`cf99c3b8`	None named 0 sources`1598be49`	None named 6 sources`7caf0102`

Sites cited in the filtered answers
Site	Answers citing it	Distinct pages	Model APIs	Best position
langchain.com	10	3	2	1
youtube.com	7	7	3	1
reddit.com	7	7	2	2
pub.towardsai.net	6	5	2	1
github.com	6	4	2	1
langfuse.com	5	1	2	2
learn.microsoft.com	4	4	2	1
rank.ai	4	4	2	1
medium.com	4	4	2	2
mastra.ai	4	3	2	1
arxiv.org	3	3	2	1
braintrust.dev	3	3	2	2
arize.com	3	1	2	1
firecrawl.dev	3	1	2	1
monday.com	3	1	2	4
ai-sdk.dev	2	3	2	1
linkedin.com	2	3	2	5
cloud.google.com	2	2	2	1
dev.to	2	2	2	2
developersdigest.tech	2	2	2	2

What this report publishesThe public buying questions, the brands each answer names, the sources it cites and a fingerprint of each answer. Answer text is not published, and no customer data is in it.ai-agent-frameworks-2026-07-27 / 4-ai-agent-frameworks-2026-07-27-models-64232fd32583

Primary brandQuestion typeModel APIQuestion contains

Run a question live

36.1%

of these answers name or cite LangGraph / Deep Agents

13 of 36 answers

72.2%

Its share of the compared brands' appearances

10

Answers citing its own site

12 links to its domains

3 of 3

Model APIs that name it

The compared brands across the filtered answers
Brand	Named or cited	Against primary	Share of compared	Mentions	Answers citing it	Links to its site	Model APIs
LangGraph / Deep Agentslangchain.com	36.1%13 of 36	Primary	72.2%	22	10	12	3 of 3
LlamaIndexllamaindex.ai	11.1%4 of 36	-25.0 pts	22.2%	12	1	1	3 of 3
OpenAI Agents SDKopenai.com	2.8%1 of 36	-33.3 pts	5.6%	1	0	0	1 of 3
Claude Agent SDKanthropic.com	0.0%0 of 36	-36.1 pts	0.0%	0	0	0	0 of 3

Compared brands named in each answer, by question and model API
Question	OpenAIopenai/gpt-4o-mini	Anthropicanthropic/claude-haiku-4-5	Geminigoogle/gemini-2.5-flash
01What are the best open-source frameworks for building reliable AI agents in a production application?Recommendation	LangGraph / Deep Agents, cited 1 4 sources`f736fd64`	None named 0 sources`a6011974`	LangGraph / Deep Agents, cited 1OpenAI Agents SDK 6 sources`30488435`
02Recommend a Python-first agent framework with typed dependencies, structured outputs, tool validation, and testability.Recommendation	None named 6 sources`0a93806d`	LangGraph / Deep Agents 5 sources`c99bde45`	None named 5 sources`8ec5300a`
03Which TypeScript toolkit is best for streaming agent interfaces, tool calling, structured data, and multiple model providers?Recommendation	None named 8 sources`dda87429`	None named 0 sources`f09a530c`	None named 7 sources`aedcdcf7`
04Recommend a framework for role-based multi-agent teams, explicit handoffs, delegation, and human approval steps.Recommendation	None named 8 sources`6b63d488`	None named 0 sources`84227f68`	LangGraph / Deep Agents, cited 1 8 sources`23fecae1`
05What is the best framework for durable stateful agent graphs with checkpointing, retries, memory, and human-in-the-loop control?Recommendation	LangGraph / Deep Agents, cited 3 9 sources`bab619ea`	LangGraph / Deep Agents 0 sources`53e4b182`	LangGraph / Deep Agents 9 sources`3064d4a5`
06Which enterprise agent framework is strongest for .NET or Java teams that need plugins, governance, telemetry, and orchestration?Recommendation	None named 5 sources`41aa6e2b`	None named 0 sources`08ecea2f`	None named 9 sources`56d2c0fe`
07Recommend a cloud-native agent development framework with managed deployment, identity, security controls, and model flexibility.Recommendation	LangGraph / Deep Agents, cited 1 5 sources`57eaa9d0`	None named 0 sources`53fb8a40`	None named 7 sources`65dc78f4`
08Which agent framework is best for retrieval-heavy applications that use documents, data connectors, indexes, and citations?Recommendation	LlamaIndex 4 sources`3ee715c7`	LlamaIndex, cited 1 3 sources`a818595e`	LangGraph / Deep Agents, cited 1LlamaIndex 5 sources`04c14517`
09How should a team compare AI agent frameworks for abstraction overhead, model portability, lock-in, and debugging complexity?Commercial comparison	LangGraph / Deep Agents, cited 1 9 sources`9baa4355`	None named 0 sources`506d6fd4`	LangGraph / Deep Agents, cited 1LlamaIndex 6 sources`4d209a67`
10Which reliability criteria matter when choosing an agent framework, including state, retries, tracing, and deterministic tests?Commercial comparison	None named 8 sources`ad62cdcd`	None named 0 sources`d2bffe8a`	LangGraph / Deep Agents, cited 1 6 sources`2b425631`
11When should an engineering team adopt an agent framework instead of building a tool-calling loop directly on a model API?Commercial comparison	LangGraph / Deep Agents, cited 1 7 sources`06b2ca23`	None named 0 sources`dd1d48fe`	None named 6 sources`548af730`
12How should a company evaluate maintainer commitment, licensing, release stability, and migration risk in an agent framework?Commercial comparison	None named 4 sources`cf99c3b8`	None named 0 sources`1598be49`	None named 6 sources`7caf0102`

Sites cited in the filtered answers
Site	Answers citing it	Distinct pages	Model APIs	Best position
langchain.com	10	3	2	1
youtube.com	7	7	3	1
reddit.com	7	7	2	2
pub.towardsai.net	6	5	2	1
github.com	6	4	2	1
langfuse.com	5	1	2	2
learn.microsoft.com	4	4	2	1
rank.ai	4	4	2	1
medium.com	4	4	2	2
mastra.ai	4	3	2	1
arxiv.org	3	3	2	1
braintrust.dev	3	3	2	2
arize.com	3	1	2	1
firecrawl.dev	3	1	2	1
monday.com	3	1	2	4
ai-sdk.dev	2	3	2	1
linkedin.com	2	3	2	5
cloud.google.com	2	2	2	1
dev.to	2	2	2	2
developersdigest.tech	2	2	2	2

What this report publishesThe public buying questions, the brands each answer names, the sources it cites and a fingerprint of each answer. Answer text is not published, and no customer data is in it.ai-agent-frameworks-2026-07-27 / 4-ai-agent-frameworks-2026-07-27-models-64232fd32583

Ranks a reviewed Agent Frameworks brand universe using a fixed, public set of neutral commercial prompts across 3 AI providers.

16

Rank on this board

0 percent

Score

3

Answers behind the score

100% confidence · 1 of 1 components evidenced

What the score is built from

1 of 1 evidenced

Every component evidenced · 1 evidence record each

Components of Claude Agent SDK's score
Component	Value	Contribution
Engine breadth	0	0

Moved down since the previous snapshot

-1 places

No component moved since the previous snapshot.

Where each number comes from

14 public records

Anthropic citation shareAnthropic brand citation share · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Anthropic mention coverageAnthropic brand mention coverage · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Anthropic recommendation-prompt presenceAnthropic brand recommendation presence · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Citation shareCitation share · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Engine breadthEngine breadth · observed Sep 14, 2026, 12:00 AM UTC0 engines100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Mention coverageMention coverage · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Reviewed-brand presence shareMention share · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Recommendation-prompt presenceRecommendation presence · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Gemini citation shareGemini brand citation share · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Gemini mention coverageGemini brand mention coverage · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
Gemini recommendation-prompt presenceGemini brand recommendation presence · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
OpenAI citation shareOpenAI brand citation share · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
OpenAI mention coverageOpenAI brand mention coverage · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source
OpenAI recommendation-prompt presenceOpenAI brand recommendation presence · observed Sep 14, 2026, 12:00 AM UTC0 percent100% confidence
Source
Rank.ai Agent Frameworks Prompt Benchmark
Grade
A
Freshness
fresh
Locator
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Open the source

Cite this data

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Plain textAgent Frameworks engine breadth. Rank.ai, data as of September 14, 2026. https://www.rank.ai/rankings/agent-frameworks/ai-agent-frameworks-brand-engine-breadth
HTML<a href="https://www.rank.ai/rankings/agent-frameworks/ai-agent-frameworks-brand-engine-breadth">Agent Frameworks engine breadth</a>, Rank.ai, data as of September 14, 2026
Markdown[Agent Frameworks engine breadth](https://www.rank.ai/rankings/agent-frameworks/ai-agent-frameworks-brand-engine-breadth), Rank.ai, data as of September 14, 2026
APARank.ai. (2026). Agent Frameworks engine breadth. Retrieved October 23, 2026, from https://www.rank.ai/rankings/agent-frameworks/ai-agent-frameworks-brand-engine-breadth

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<iframe src="https://www.rank.ai/embed/boards/ai-agent-frameworks-brand-engine-breadth" title="Agent Frameworks engine breadth" width="100%" height="420" loading="lazy" style="border:1px solid #111;max-width:720px"></iframe>
<p style="font-size:12px">Source: <a href="https://www.rank.ai/rankings/agent-frameworks/ai-agent-frameworks-brand-engine-breadth">Agent Frameworks engine breadth</a> by Rank.ai</p>

More in AI agent frameworks

Open source and vendor backed agent frameworks ranked across a fixed engineering buying corpus, with brand, prompt, engine and citation source views.

3 boards

AI agent framework rank

Reviewed agent frameworks ranked by how often answers to the category's recommendation questions name or cite them, across three model APIs.

1LangGraph / Deep Agents37.5%
2CrewAI25%
3Mastra516.7%

AI agent framework presence

Reviewed frameworks ranked by the share of all the category's answers that name or cite them.

1LangGraph / Deep Agents36.1%
2CrewAI22.2%
3Mastra516.7%

AI agent framework citation share

Reviewed frameworks ranked by distinct answer-level citations to their canonical domains.

1LangGraph / Deep Agents36.4%
2Microsoft Agent Framework18.2%
3Vercel AI SDK318.2%

AI agent framework rank

Reviewed agent frameworks ranked by how often answers to the category's recommendation questions name or cite them, across three model APIs.

AI agent framework presence

Reviewed frameworks ranked by the share of all the category's answers that name or cite them.

AI agent framework citation share

Reviewed frameworks ranked by distinct answer-level citations to their canonical domains.

See how often AI names you.

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Your grade out of 100How often AI names you, cites your site, and how high it ranks you.
Who gets namedEvery competitor in the answers, most named first.
The pages AI readsThe sources behind each answer.
Three fixesWhat to fix first, with a brief for the first article.

Agent Frameworks engine breadth

All 16 companies by engine breadth

One brand against up to three competitors, answer by answer

Which compared brands each answer names

The sites these answers cite

One brand against up to three competitors, answer by answer

Which compared brands each answer names

The sites these answers cite

Claude Agent SDK on Agent Frameworks Engine Breadth

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Where each number comes from

More in AI agent frameworks

See how often AI names you.

One brand against up to three competitors, answer by answer

Which compared brands each answer names

The sites these answers cite