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Flagship — best answers, highest costCommercial API
o3 Pricing
OpenAI · openai-o3
Input / 1M tokens
$2.00
Output / 1M tokens
$8.00
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)$0.0056
1,000 requests / month$5.60/mo10,000 requests / month$56.00/mo100,000 requests / month$560.00/moEstimate your own workloadOpens the calculator with o3 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 multi-step reasoning on math, coding, and scientific tasks. Supports long context with high output limits.
The business tradeoff
Elevated output-token pricing and latency 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.