Claude Agent SDK VS OpenAI Agents SDK
As of 30 October 2026, OpenAI Agents SDK is named by 140 companies and Claude Agent SDK by 122; Claude Agent SDK skews to companies under 200 people (34% vs 41%), OpenAI Agents SDK to companies over 1,000 (36% vs 43%).
As of 30 October 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
The website-and-DNS footprint is not comparable between a marketing suite and a CRM: Claude Agent SDK's script and mail records show on hundreds of thousands of small sites, OpenAI Agents SDK rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- Claude Agent SDK: 2–200 employees
- 34%
- OpenAI Agents SDK: 2–200 employees
- 41%
- Claude Agent SDK: 1,000+ employees
- 43%
- OpenAI Agents SDK: 1,000+ employees
- 36%
- Postings per company, 90 days
- 2.1 · 2.7
- Website or DNS footprint
- 0 · 0
Who chooses which
Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.
| Segment | Claude Agent SDK | share | OpenAI Agents SDK | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 2 | 2% | 1 | 1% | even |
| 2-10 employees | 12 | 10% | 11 | 8% | even |
| 11-50 employees | 14 | 11% | 19 | 14% | OpenAI Agents SDK |
| 51-200 employees | 16 | 13% | 28 | 20% | OpenAI Agents SDK |
| 201-500 employees | 15 | 12% | 18 | 13% | even |
| 501-1000 employees | 10 | 8% | 12 | 9% | even |
| 1001-5000 employees | 27 | 22% | 24 | 17% | Claude Agent SDK |
| 5001-10000 employees | 5 | 4% | 9 | 6% | OpenAI Agents SDK |
| 10,001+ employees | 21 | 17% | 18 | 13% | Claude Agent SDK |
| Segment | Claude Agent SDK | share | OpenAI Agents SDK | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 68 | 56% | 80 | 57% | even |
| Business & finance services | 28 | 23% | 36 | 26% | OpenAI Agents SDK |
| Manufacturing & industry | 8 | 7% | 6 | 4% | Claude Agent SDK |
| Consumer services & leisure | 4 | 3% | 2 | 1% | even |
| Media & content | 4 | 3% | 3 | 2% | even |
| Health care | 3 | 2% | 4 | 3% | even |
| Property & construction | 3 | 2% | 2 | 1% | even |
| Commerce & trade | 2 | 2% | 1 | 1% | even |
| Hospitality & travel | 1 | 1% | 1 | 1% | even |
| Utilities & infrastructure | 1 | 1% | 2 | 1% | even |
| Public, community & associations | – | – | 3 | 2% | outside top 12 |
| Segment | Claude Agent SDK | share | OpenAI Agents SDK | share | Leans |
|---|---|---|---|---|---|
| United States | 83 | 68% | 92 | 66% | Claude Agent SDK |
| United Kingdom | 9 | 7% | 9 | 6% | even |
| France | 4 | 3% | 5 | 4% | even |
| Australia | 3 | 2% | 3 | 2% | even |
| Japan | 3 | 2% | – | – | outside top 12 |
| Canada | 2 | 2% | 3 | 2% | even |
| Germany | 2 | 2% | 8 | 6% | OpenAI Agents SDK |
| Poland | 2 | 2% | – | – | outside top 12 |
| Argentina | 1 | 1% | 1 | 1% | even |
| Austria | 1 | 1% | – | – | outside top 12 |
| Belgium | 1 | 1% | – | – | outside top 12 |
| Brazil | 1 | 1% | – | – | outside top 12 |
| Sweden | – | – | 3 | 2% | outside top 12 |
| United Arab Emirates | – | – | 2 | 1% | outside top 12 |
| Spain | – | – | 2 | 1% | outside top 12 |
| India | – | – | 2 | 1% | outside top 12 |
| BD | – | – | 1 | 1% | outside top 12 |
| Segment | Claude Agent SDK | share | OpenAI Agents SDK | share | Leans |
|---|---|---|---|---|---|
| Data & AI | 183 | 60% | 244 | 55% | Claude Agent SDK |
| Software engineering | 70 | 23% | 80 | 18% | Claude Agent SDK |
| IT operations & business systems | 7 | 2% | 19 | 4% | even |
| Product, program & project management | 7 | 2% | 8 | 2% | even |
| Sales | 6 | 2% | 21 | 5% | OpenAI Agents SDK |
| Education & training | 3 | 1% | – | – | outside top 12 |
| General management & consulting | 2 | 1% | 6 | 1% | even |
| Human resources | 2 | 1% | – | – | outside top 12 |
| Administration & office | – | – | 1 | 0% | outside top 12 |
| Customer service & success | – | – | 1 | 0% | outside top 12 |
| Engineering (non-software) | – | – | 1 | 0% | outside top 12 |
| Finance & accounting | – | – | 1 | 0% | outside top 12 |
The companies behind each column
Companies using Claude Agent SDK →
Companies using OpenAI Agents SDK →
llm app frameworks ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
OpenAI Agents SDK is named by 140 companies in job postings and Claude Agent SDK by 122; 47 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/claude-agent-sdk-vs-openai-agents-sdk)
Read from the source, not self-reported
Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →
- Job postingsRead hourly from career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
- Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
- SegmentsCountry, size and industry from the company profile built from its website.
- Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
Claude Agent SDK vs OpenAI Agents SDK: questions
Which is more used, Claude Agent SDK or OpenAI Agents SDK?
By companies naming it in their own job postings, OpenAI Agents SDK (140) over Claude Agent SDK (122). By website-and-DNS footprint, OpenAI Agents SDK (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses Claude Agent SDK?
34% of Claude Agent SDK companies have 2 to 200 employees, against 41% for OpenAI Agents SDK. 43% of Claude Agent SDK companies have over 1,000 employees, against 36% for OpenAI Agents SDK.
Do companies run both?
47 companies name both in their postings, usually Claude Agent SDK in marketing and OpenAI Agents SDK in sales, or during a migration.
Where do these numbers come from?
From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.
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