StepFun
- Rank
- Score
- 113/149
- 33 out of 100
StepFun is a Chinese artificial intelligence company headquartered in Shanghai, founded in April 2023 by former Microsoft employees including Jiang Daxin. It develops the Step family of foundation models, such as the open-weight Step 3.5 Flash, and offers them through its own API platform.
Is Step safe?
Step scores 33 out of 100 and ranks 113 of 149, and the rating is low confidence. Its strongest category is Privacy, and its weakest category is Security.
How is Step scored?
Step is scored out of 100 on Safety (25%), Transparency (25%), Security (25%), and Privacy (25%). See how we score.
Safety framework
Average used24.4This outside rating doesn't cover this company, so the average of the companies it covers is used.
Pre-release testing
0Points for each confirmed yes.
- No
Was the model tested for dangerous capabilities, such as biological, chemical or cyber risks?
Company claim0/50huggingface.co (opens in a new tab) · 20 Oct 2026 - No
Did an outside organisation test the model before release?
Company claim0/50huggingface.co (opens in a new tab) · 20 Oct 2026
Safety test results
Average used74.1This outside rating doesn't cover this company, so the average of the companies it covers is used.
Incident record
Not enough dataProtecting children
50Points for each confirmed yes.
- No
Does the model card report child-safety tests or safeguards?
Company claim0/50huggingface.co (opens in a new tab) · 20 Oct 2026 - Yes
Does the privacy policy set a minimum age, or say the service is not directed at children?
Company claim50/50“Additionally, our Services are not directed towards, and we do not knowingly collect, sell, or share any information about individuals under…” MoreLess
“Additionally, our Services are not directed towards, and we do not knowingly collect, sell, or share any information about individuals under the age of 18.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026
Model documentation
50Points for each confirmed yes.
- Yes
Does the model card describe what the model can do?
Company claim25/25“It supports up to 1 million tokens of context and accepts text, images, and video, enabling sustained reasoning and tool use across complex…” MoreLess
“It supports up to 1 million tokens of context and accepts text, images, and video, enabling sustained reasoning and tool use across complex tasks.”
huggingface.co (opens in a new tab) · 20 Oct 2026 - Yes
Does the model card report test results?
Company claim25/25“Performance” (results shown as an image on the source page)
huggingface.co (opens in a new tab) · 20 Oct 2026 - No
Does the model card state the model's limitations?
Company claim0/25huggingface.co (opens in a new tab) · 20 Oct 2026 - No
Does the model card describe safety safeguards?
Company claim0/25huggingface.co (opens in a new tab) · 20 Oct 2026
Training-data disclosure
Average used29.9This outside rating doesn't cover this company, so the average of the companies it covers is used.
Independent transparency index
Average used40.7This outside rating doesn't cover this company, so the average of the companies it covers is used.
Transparency reports
Average used25This outside rating doesn't cover this company, so the average of the companies it covers is used.
Public safety commitments
0Average of the commitments signed.
- No
Has it signed the EU code of practice for general-purpose AI?
Company claim0/100European Commission (opens in a new tab) · 14 Oct 2026 - No
Did it sign only the safety and security chapter?
Company claim0/50European Commission (opens in a new tab) · 14 Oct 2026 - No
Has it signed the Frontier AI Safety Commitments (Seoul 2024)?
Company claim0/100Frontier AI Safety Commitments (opens in a new tab) · 14 Oct 2026
Security programme and certifications
0Points for each confirmed yes.
- No
Is there a way to report security flaws, such as a bug bounty?
Company claim0/34No document found - No
Does it state it holds a SOC 2 Type II report?
Company claim0/33No document found - No
Does it state it holds ISO 27001 certification?
Company claim0/33No document found
Software vulnerabilities
Not enough dataData breaches
Not enough dataClear privacy policy
100Points for each confirmed yes.
- Yes
Does the privacy policy say what personal data is collected?
Company claim20/20“This includes your email address/Google Account (as applicable), verification code and password.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026 - Yes
Does the privacy policy say whether your data is used to train AI?
Company claim20/20“We may use and retain such data to evaluate and improve our models, products, and services, including for issue analysis, training, and fine…” MoreLess
“We may use and retain such data to evaluate and improve our models, products, and services, including for issue analysis, training, and fine-tuning where permitted by applicable law and program terms.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026 - Yes
Does the privacy policy say how long data is kept?
Company claim20/20“IP addresses are retained for 3 years.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026 - Yes
Does the privacy policy say who your data is shared with?
Company claim20/20“In such cases, we may share some of your personal information with our partners.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026 - Yes
Does the privacy policy explain your privacy rights?
Company claim20/20“You may have the right to request that we correct inaccurate personal information that we retain about you, subject to certain exceptions.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026
Training-data defaults
0100 if training is opt-in only, 50 if you can opt out, 0 if neither.
- No
Is your data used for training only if you opt in?
Company claim0/100platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026 - No
Can you stop your data being used for training?
Company claim0/50platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026
Export and delete your data
100Points for each confirmed yes.
- Yes
Can you get a copy of your data?
Company claim50/50“You may have the right to access and obtain a copy of your personal information in accordance with the applicable laws.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026 - Yes
Can you delete your data?
Company claim50/50“You have the right to delete your account and erase your personal information.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026
Privacy fines
Not enough dataIndependent privacy ratings
Average used52.9This outside rating doesn't cover this company, so the average of the companies it covers is used.
Risk governance
Average used26.6This outside rating doesn't cover this company, so the average of the companies it covers is used.
Regulator actions
Not enough dataCourt judgments
Not enough dataPrivacy contact and complaints
100Points for each confirmed yes.
- Yes
Is there a privacy contact, such as an email or a data protection officer?
Company claim50/50“Contact Details: platform@stepfun.com”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026 - Yes
Does it tell you that you can complain to a regulator?
Company claim50/50“If you live or work in the UK, you have the right to lodge a complaint with the UK Information Commissioner’s Office.”
platform.stepfun.ai privacy policy (opens in a new tab) · 20 Oct 2026
Score history
Newest first. Only days when the score changed are listed.
2 Nov 2026
Score 33
Method 2 Nov 2026
+1
23 Oct 2026
Score 32
Method 21 Oct 2026
+2
21 Oct 2026
Score 30
Method 21 Oct 2026
-2
20 Oct 2026
Score 32
Method Not recorded
+2
14 Oct 2026
Score 30
Method Not recorded
-