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OpenAI

o3

Deliberate o-series reasoner for hard math, coding, and multi-step analysis

Model facts

Context window
2K tokens
Maximum output
1K tokens
Cheapest paid input
$1 per 1M tokens
Cheapest paid output
$4 per 1M tokens
Open weights
no
Providers
20

Capabilities and modalities

reasoning, tool calling, structured output, attachments, temperature control, text, image, pdf.

Artificial Analysis benchmarks

Compare this model on the full LLM benchmark leaderboard.

ConfigurationAAICodingMathOutput tokens/s
default31.1not measured88.3128.7

Observed price history

  • 2026-08-24: $1 input / $4 output per 1M tokens
  • 2026-08-28: $1.8 input / $7.2 output per 1M tokens
  • 2026-08-31: $1 input / $4 output per 1M tokens

API providers