OpenAI o3
v2025-01OpenAI
DEPRECATED: the entire o3 family now has shutdown dates — o3 (o3-2025-04-16) and o3-pro shut down in the API on 2026-12-11 (announced 2026-06-11), o3-deep-research shuts down 2026-07-23, and o3-mini shuts down 2026-10-23. Migration targets are GPT-5.5 (o3, o3-mini) and GPT-5.5-pro (o3-pro, o3-deep-research). Historically OpenAI's most advanced reasoning model of its era, with exceptional performance on complex coding and mathematical tasks.
Trust Vector Analysis
Dimension Breakdown
🚀Performance & Reliability+
Industry-leading performance on coding and reasoning tasks. Significantly higher latency due to chain-of-thought reasoning process, but delivers exceptional accuracy.
Industry-standard coding benchmarks measuring real-world programming tasks
Advanced reasoning benchmarks requiring multi-step problem solving
Crowdsourced blind comparisons and comprehensive knowledge testing
Internal testing with repeated prompts at various temperature settings
Median latency for API requests with standard prompt sizes
95th percentile response time across diverse workloads
Official specification from provider
Historical uptime data from official status page
🛡️Security+
Strong security posture with reasoning-enhanced safety checks. Robust resistance to adversarial attacks.
Testing against OWASP LLM01 prompt injection attacks
Testing against adversarial prompt datasets
Analysis of privacy policies and data handling practices
Comprehensive safety testing across harmful content categories
Review of API security features and best practices
🔒Privacy & Compliance+
Good privacy practices with opt-out for training data. 30-day data retention for abuse monitoring is longer than some competitors.
Review of enterprise documentation and privacy policies
Analysis of privacy policy and data usage terms
Review of terms of service and data retention policies
Review of data protection capabilities and customer responsibilities
Verification of compliance certifications and audit reports
Review of data handling practices
👁️Trust & Transparency+
Excellent explainability through chain-of-thought reasoning. Strong hallucination resistance. Training data transparency could be improved.
Evaluation of reasoning transparency and explanation capabilities
Testing on factual QA datasets and real-world usage
Evaluation on bias benchmarks and diverse demographic testing
Qualitative assessment of confidence expression in outputs
Review of documentation completeness and clarity
Review of public disclosures about training data
Analysis of built-in safety mechanisms
⚙️Operational Excellence+
Deprecated: o3 and o3-pro API shutdown 2026-12-11 (announced 2026-06-11); o3-deep-research shuts down 2026-07-23 and o3-mini 2026-10-23. Migration targets GPT-5.5 / GPT-5.5-pro. Versioning and ecosystem scores reduced to reflect deprecation.
Review of API design, consistency, and feature completeness
Review of SDK quality, documentation, and maintenance
Review of versioning policy and historical practices
Review of available monitoring tools and metrics
Assessment of documentation, community, and support responsiveness
Analysis of third-party integrations and tools
Review of licensing terms and restrictions
- +Industry-leading coding performance (91.6% HumanEval)
- +Exceptional mathematical and reasoning capabilities (96.7% MATH)
- +Chain-of-thought reasoning provides transparency and accuracy
- +Strong performance on PhD-level reasoning tasks (87.7% GPQA)
- +Reduced hallucination rate through reasoning process
- +Excellent for complex problem-solving and algorithm development
- !Higher latency due to reasoning overhead (~3.2s p50, ~6.5s p95)
- !30-day data retention longer than some competitors
- !Reasoning tokens billed as output can multiply effective cost despite $2/$8 list pricing
- !Not HIPAA eligible
- !Limited regional data residency options
- !Reasoning overhead unnecessary for simple tasks
- !DEPRECATED: o3 and o3-pro API shutdown 2026-12-11; o3-deep-research shuts down 2026-07-23 and o3-mini 2026-10-23 — migrate to GPT-5.5 / GPT-5.5-pro
Use Case Ratings
code generation
Industry-leading code generation with 91.6% HumanEval. Exceptional for complex algorithms and competitive programming. Chain-of-thought reasoning helps with architectural decisions.
customer support
Slower response times make it less ideal for real-time support. Better suited for complex troubleshooting requiring deep reasoning.
content creation
Good for technical content requiring accuracy. Reasoning overhead may be unnecessary for creative writing.
data analysis
Excellent for complex data analysis and statistical reasoning. Strong mathematical capabilities.
research assistant
Outstanding for research requiring deep reasoning and mathematical analysis. Chain-of-thought provides detailed explanations.
legal compliance
Strong reasoning capabilities useful for contract analysis. 30-day data retention may be concern for some legal applications.
healthcare
Good analytical capabilities but lacks HIPAA eligibility. Data retention policies may limit healthcare applications.
financial analysis
Exceptional mathematical reasoning and complex financial modeling. Chain-of-thought reasoning provides audit trails.
education
Outstanding for STEM education. Chain-of-thought reasoning shows detailed problem-solving steps.
creative writing
Capable but reasoning overhead unnecessary for creative tasks. Better options available for pure creative writing.