MyCaptionAI
Introducing o3 (and o3-pro, o3-deep-research)OpenAIReleased May 15, 2025

o3 (and o3-pro, o3-deep-research)

Frontier reasoning model establishing a new benchmark for complex coding, mathematical proofs, and automated research workflows.

reasoning-llmProprietary API$2.00 / 1M tok (Reasoning Flagship)Context: 200K (200,000 tokens)Arena ELO: 1410
Official Model Card & DocsTry in AI Studio / PlaygroundResearch PaperGitHub Repository

Technical Specifications

Architecture Type
Next-Gen Multimodal Reasoning Transformer
Total Parameters
Frontier Scale
Context Window
200K (200,000 tokens)
Max Output Tokens
100K (100,000 tokens)
Knowledge Cutoff
June 2024
Supported Modalities
text, code, vision, reasoning
License & Access
OpenAI Business Terms

Benchmark Evaluations

Math500
97.4
Mmlu Pro
82.5
Humaneval
95.8
Swe Bench Verified
71.7
Chatbot Arena ELO
1410

Deep Architectural Overview

o3 sets the highest standard for deep multi-step analysis across text, code, and images. It powers autonomous research agents, executes complex terminal commands, and solves long-horizon engineering issues on SWE-bench.

Strengths & Considerations

Core Strengths
  • 71.7% on SWE-bench Verified coding benchmark
  • Native multimodal visual thinking
  • Powers automated deep research synthesis
Known Limitations
  • Succeeded by GPT-5 unified architecture

Token & API Pricing

Input Tokens (1M)$2.00
Output Tokens (1M)$8.00
Cached Input (1M)$0.5000
Pricing is verified directly against OpenAI's developer documentation and API rate sheets.

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