Model Cards / OpenAI

GPT-5.5 System Card

model card14,567 words·63 min read·May 3, 2026·Source
Version History
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Summary
14,567-word document condensed to 190 words. OpenAI · May 3, 2026
TL;DR

GPT-5.5 is a new model designed for complex, real-world work, including writing code, researching online, analyzing information, creating documents and spreadsheets, and moving across tools to get things done. Relative to earlier models, GPT-5.5 understands the task earlier, asks for less guidance, uses tools more effectively, checks it work and keeps going until it’s done.

Top benchmarks
BenchmarkVariantScore
CoT Monitorability Evaluationhealth_queries_evidence_field96.0%
Biochemistry Knowledge Improvementreward_at_432.3%
DNA Sequence Design for Transcription Factor Bindingpass_at_113.8%
Hard Negative Protein Binding Predictionwith-tools, pass_at_440.0%
First Person Fairness Evaluationharm_overall1.1%

Showing top 5 of 17. See full list below.

Capability claim
  • We are releasing GPT-5.5 with our strongest set of safeguards to date, designed to reduce misuse while preserving legitimate, beneficial uses of advanced capabilities.
Mitigations
  • we have deployed an expanded set of safeguards to restrict the ability of malicious actors to benefit from increased capabilities in cybersecurity performance (section link to Cyber Safeguards section).
  • we trained GPT-5.5 to refuse requests that clearly enable unauthorized, destructive, or harmful actions, including areas such as malware deployment, credential theft, and exfiltration.
Deployment scope
  • available on the internet, information that we partner with third parties to access, and information that our users or human trainers and researchers provide or generate.

Every italicized passage is a verbatim substring of the source document (checked deterministically after extraction). Field selection is heuristic — some quotes may lack surrounding context and some claims may be absent if no matching pattern appeared. For citation, open the source: original model card · source SHA d047a83321e0 · version dated May 3, 2026.

Extracted Evaluations(17 results)

Sort by:0/17 rows fully reproducible (0%)
BenchmarkCategoryStateScoreSetupSource
/ verified
codingmentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
/ pro
knowledgementioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
CoT Monitorability Evaluation/ health_queries_evidence_field
otherscored
96.0
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
Biochemistry Knowledge Improvement
otherscored
32.3
reward at 4
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
otherscored
13.8
pass at 1
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
otherscored
0.4
pass at 4
with-toolsmissing: shot countmissing: languagemissing: training state
self-reported
otherscored
0.0
harm overall
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
VulnLMP
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
CoT Monitorability Evaluation/ health_queries_patient_opinion
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
Anti-Scheming Evaluation
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
Memory Evaluation
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
/ open_ended
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
Tacit Knowledge and Troubleshooting
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
Capture the Flag/ professional
othermentioned
pass at 12
with-toolsmissing: shot countmissing: languagemissing: training state
self-reported
CVE-Bench
othermentioned
pass at 1
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
Cyber Range
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported
othermentioned
missing: shot countmissing: methodmissing: languagemissing: training state
self-reported