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OpenAI · 2026

o4

9.3Reasoning

CompanyOpenAI

Release2026

TypeReasoning

Context window256K tokens

Input typesText, Image

Output typesText

ReasoningBest-in-class

CodingExcellent

MultimodalPartial

API availableYes

PricingIn ChatGPT / API

Overview

o4 is a reasoning model from OpenAI, released in 2026. It accepts text, image as input and produces text. With a context window of 256K tokens, it is well suited to hard reasoning, math and complex coding.

Capabilities

On reasoning, o4 is rated best-in-class, while its coding ability is excellent. Multimodal support: Partial. These characteristics make it a strong fit for hard reasoning, math and complex coding. As with any frontier system, real-world performance depends heavily on how you prompt and integrate it.

Availability & Pricing

o4 is accessible via an API. Pricing model: In ChatGPT / API. Availability and pricing for AI models change frequently; confirm the latest details from OpenAI before building on it.

Best Use Cases

The sweet spot for o4 is hard reasoning, math and complex coding. Teams choosing a model should weigh context length, cost, latency and modality against their workload — o4 is a particularly good match when those priorities align with its strengths.

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