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Flagship — best answers, highest costCommercial API
o3 Pro Pricing
OpenAI · openai-o3-pro
Input / 1M tokens
$20.00
Output / 1M tokens
$80.00
Context window
200k tokens
≈ 267 pages of text
Max output
100k tokens
What it costs in practice
Typical request (1,200 in + 400 out tokens)$0.056
1,000 requests / month$56.00/mo10,000 requests / month$560.00/mo100,000 requests / month$5,600.00/moEstimate your own workloadOpens the calculator with o3 Pro preloaded — adjust volume and token counts there.
Price history
Only one price point recorded so far.
The staircase chart appears once a price change is detected.
What it excels at
Strong performance on complex multi-step reasoning, mathematics, science, and coding tasks that benefit from extended internal chain-of-thought.
The business tradeoff
High output-token cost and increased latency from reasoning overhead; narrower tooling and integration ecosystem than standard GPT models.
Cheaper from OpenAI
Head-to-head
Vendor list rates, as of Jun 15, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.