# OpenAI Reasoning Models (o1 / o3) — AI Tool Profile
> Source: https://agentrobbies.com/tools/gpt-reasoning-models
> Ecosystem: OPENAI | Verified: 2026-10-11
> 100% Independent Listing • Zero Affiliate Links

## Description
Deliberate chain-of-thought models designed to solve complex multi-step problems in mathematics, scientific research, and complex software engineering.

## Access & Pricing
Included in ChatGPT Plus, Pro, Team, Enterprise, and developer API with tiered rate limits.

## Key Capabilities
- Produces step-by-step verified reasoning chains before outputting code or proofs.
- Competitive programming performance and doctoral-level science benchmarks.
- Autonomous debugging across complex multi-file codebases.

## Alternatives & Replaces
- Claude 3.5 Sonnet / 4 Opus
- Gemini 3 Pro Deep Research

## Robbie's Take
**Robbie's Workflow Take:** Best evaluated within a bounded workspace using version control. Configure strict tool approvals and MCP permission gates before granting terminal or file execution access. Monitor token spend carefully when running multi-turn autonomous refactoring loops.

## Direct Link
https://openai.com/index/introducing-openai-o1-preview/