OpenAI
Pioneering general-purpose AI with the GPT-4 and o-series reasoning model families.
About
About OpenAI
OpenAI triggered the modern LLM era with GPT-3 in 2020 and the public AI inflection point with ChatGPT in 2022. Today it develops two parallel model lines: the GPT series for general-purpose tasks and the o-series (o1, o3, o4) for demanding reasoning problems. GPT-4.1 offers a 1M token context window while the o-series applies deliberate chain-of-thought inference before responding.
Key highlights
Industry-defining o-series reasoning models with deliberative inference
GPT-4.1 offers a 1M token context window for full codebase comprehension
Real-time multimodal capability: text, images, and audio in one model
OpenAI Batch API for 50%-discounted asynchronous high-volume jobs
Deep enterprise integrations via Microsoft Azure OpenAI Service
Models
4 models tracked
Context windows, pricing, capabilities, and API identifiers — everything you need to choose the right model for your workload.
o3
2025
OpenAI's most powerful reasoning model. Uses extended deliberative inference to tackle the hardest problems in mathematics, science, and software engineering.
- Advanced chain-of-thought reasoning
- Mathematics & science
- Complex coding
- Agentic planning
o3o4-mini
2025
A lightweight reasoning model with strong performance on STEM and coding tasks at significantly lower cost than o3, with added vision capability.
- Fast reasoning
- Cost-efficient
- Vision support
- STEM benchmarks
o4-miniGPT-4o
2024
The standard multimodal GPT-4o model. Supports text, images, and audio natively. Default choice for conversational AI, customer support, and general-purpose generation.
- Multimodal text + image + audio
- Real-time responses
- Broad general knowledge
- Conversational AI
gpt-4oGPT-4.1
2025
GPT-4.1 offers the largest context window in the GPT family (1M tokens) with improved instruction following and a focus on software engineering tasks.
- 1M token context window
- Improved instruction following
- Large codebase analysis
- Strong coding performance
gpt-4.1Use Cases
What OpenAI is best for
Each provider has specialisms shaped by their architecture decisions, training data, and API design. Here is where OpenAI performs best.
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Visit the official OpenAI platform to access API keys, documentation, and pricing details.