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OpenAI

o3

Complete specs, pricing, and benchmark data for o3 by OpenAI. Last verified 2026-10-05.

JSON ModeFunctionsStreamingCode Exec
Pricing

Input / 1M tokens

$2.00

Output / 1M tokens

$8.00

Context & Output

Context Window

200K

Max Output

100,000

TTFT

600ms

Speed

15 tok/s

Benchmarks

Arena ELO

1340

Coding ELO

1320

Reasoning ELO

1350

HumanEval

98

MMLU

95

MATH

96

GPQA

94

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Price History (Input $/M tokens)

Strengths
  • +Highest reasoning capability
  • +Best math performance
  • +Code execution
Limitations
  • -Most expensive
  • -Slowest inference
  • -Limited context vs o1

Best For

ReasoningCodingMath

Compare o3 with...

vs Claude Opus 4vs Claude Sonnet 4vs Gemini 2.5 Provs Claude Haiku 4vs DeepSeek R1vs Qwen 2.5 Maxvs Gemini 2.0 Flashvs DeepSeek V3vs o3-minivs o1vs Qwen 3 235B MoEvs Gemini Experimental 1206
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