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Flagship — best answers, highest costCommercial API
o1-pro Pricing
OpenAI · openai-o1-pro
Input / 1M tokens
$150.00
Output / 1M tokens
$600.00
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)$0.42
1,000 requests / month$420.00/mo10,000 requests / month$4,200.00/mo100,000 requests / month$42,000.00/moEstimate your own workloadOpens the calculator with o1-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
Performs extended chain-of-thought reasoning on mathematics, science, and multi-step coding problems. Supports 200k context with 100k output for long technical documents.
The business tradeoff
Output pricing at $600 per million tokens and high latency from internal deliberation limit high-volume use. Smaller ecosystem and fewer tool integrations than GPT-4o.
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.