OpenAI: o3

Image input File input Text input Text output
Author's Description

o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following. Use it to think through multi-step problems that involve analysis across text, code, and images. Note that BYOK is required for this model. Set up here: https://openrouter.ai/settings/integrations

Key Specifications
Cost
$$$$$
Context
200K
Parameters
400B (Rumoured)
Released
Apr 16, 2025
Supported Parameters

This model supports the following parameters:

Tool Choice Max Tokens Structured Outputs Tools Seed Response Format
Features

This model supports the following features:

Structured Outputs Response Format Tools
Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $2
Completion $8
Input Cache Read $0.5

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
OpenAI
OpenAI | openai/o3-2025-04-16 200K $2 / 1M tokens $8 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Free Executions Accuracy Cost Duration
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