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OpenAI

o3

Complete specs, pricing, and benchmark data for o3 by OpenAI. Last verified 2026-04-13.

JSON ModeFunctionsStreamingCode Exec
Pricing

Input / 1M tokens

$10.00

Output / 1M tokens

$40.00

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 Gemini 2.5 Provs DeepSeek R1vs o1vs Qwen 3 235B MoEvs Gemini Experimental 1206vs GPT-4.5vs DeepSeek R1 (Groq)vs Llama 4 Maverickvs DeepSeek R1 (Together)vs Grok 3vs Claude Sonnet 4
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