OpenAI o1-mini
v2024-12OpenAI
RETIRED: o1-mini was shut down in the OpenAI API on 2025-10-27 (o1-preview on 2025-07-28) and removed from ChatGPT; it is no longer available anywhere. OpenAI's stated replacement was o4-mini, itself now scheduled for shutdown 2026-10-23 — migrate new work to the GPT-5.x family (gpt-5.5 / gpt-5.4-mini). Historically an efficient reasoning model with chain-of-thought capabilities at lower cost than o1.
Trust Vector Analysis
Dimension Breakdown
🚀Performance & Reliability+
Good reasoning performance with faster inference than o3. Balanced for cost-sensitive reasoning tasks.
Industry-standard coding benchmarks
Mathematical reasoning benchmarks
Knowledge testing benchmarks
Internal testing
Median latency
Official specification
🛡️Security+
Strong security with reasoning-enhanced safety.
OWASP LLM01 testing
Adversarial testing
Policy analysis
Safety benchmarks
API review
🔒Privacy & Compliance+
Standard OpenAI privacy with 30-day retention.
Documentation review
Policy analysis
Documentation review
Certification verification
Policy review
👁️Trust & Transparency+
Excellent explainability via chain-of-thought. Good transparency.
Reasoning transparency evaluation
Factual QA testing
Qualitative assessment
Documentation review
Public disclosure review
Safety system analysis
⚙️Operational Excellence+
Retired: o1-mini API shut down 2025-10-27 (per OpenAI deprecations page, verified 2026-07-09). Model is no longer accessible; entry retained for historical reference. Versioning and ecosystem scores reduced to reflect retirement.
Policy review
Tool review
- +Good coding performance (63.6% HumanEval)
- +Chain-of-thought reasoning provides transparency
- +Strong mathematical capabilities (78% MATH)
- +Faster than o3 with lower cost
- +Good balance of reasoning and speed
- +Mature OpenAI ecosystem
- !Higher latency than non-reasoning models (~1.8s p50)
- !30-day data retention
- !Not HIPAA eligible
- !Reasoning overhead unnecessary for simple tasks
- !Lower performance than o3 on complex tasks
- !Premium pricing for reasoning capabilities
- !RETIRED: API shut down 2025-10-27; removed from ChatGPT — no longer available, migrate to GPT-5.x (gpt-5.5 / gpt-5.4-mini)
Use Case Ratings
code generation
Good coding (63.6% HumanEval) with reasoning transparency.
customer support
Reasoning overhead may be unnecessary for basic support.
content creation
Good quality but reasoning overhead for simple content.
data analysis
Strong analytical capabilities with reasoning traces.
research assistant
Excellent with reasoning transparency and good knowledge.
legal compliance
Good reasoning but 30-day retention may limit use.
healthcare
Not HIPAA eligible.
financial analysis
Good for financial modeling with reasoning traces.
education
Excellent for STEM with step-by-step reasoning.
creative writing
Reasoning overhead unnecessary for creative tasks.