← All models
Flagship — best answers, highest costCommercial API
o1 Pricing
OpenAI · openai-o1
Input / 1M tokens
$15.00
Output / 1M tokens
$60.00
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)$0.042
1,000 requests / month$42.00/mo10,000 requests / month$420.00/mo100,000 requests / month$4,200.00/moEstimate your own workloadOpens the calculator with o1 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 well on multi-step reasoning, mathematics, science, and complex coding tasks that benefit from extended internal deliberation.
The business tradeoff
High latency and elevated output-token cost from internal reasoning steps; narrower tool and ecosystem support 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.