Historical model (deprecated). The rates below are the last recorded rates, not a recommendation for a new deployment.
Current price verification is unresolved or overdue. These are the last recorded rates; check the official source before budgeting. We do not relabel an old check with today's build date.
o3 API Pricing
o3 costs $2.00 per 1M input tokens and $8.00 per 1M output tokens. These rates were last verified on .
Moving off o3?
Same token usage, 3:1 input:output, standard list rates · excludes cache, batch and fast mode. Not a quality or compatibility claim. Full calculator →
OpenAI reasoning pricing history
USD · units shown per rate- Input: $20.00 / 1M tokensOutput: $80.00 / 1M tokensRate first observedDeprecated · 2026-12-11Verified 2026-11-12
- Input: $2.00 / 1M tokensOutput: $8.00 / 1M tokensRate first observedDeprecated · 2026-12-11Verified 2026-10-31
- Input: $150.00 / 1M tokensOutput: $600.00 / 1M tokensRate first observedShut downVerified 2026-11-12
- Input: $15.00 / 1M tokensOutput: $60.00 / 1M tokensRate first observedShut downVerified 2026-11-12
Newest first. Release dates describe the model, not when today's rates took effect. Observations show when we recorded rates, not launch pricing. Image and text token meters are separate; no fixed image-token savings mix is assumed. How we verify
Published rates and billing units
| Billing dimension | USD list price |
|---|---|
| Input / 1M tokens | $2.00 |
| Cached input / 1M tokens | $0.50 |
| Output / 1M tokens | $8.00 |
Verified 2026-10-31 · Official source · Pricing methodology. Taxes, optional services and account-specific discounts are not included.
Cost examples
These examples use published list prices only. They exclude taxes, enterprise discounts, minimum charges, retries, batch discounts, and provider-specific billing rules.
1M input + 1M output
$10.00
A direct per-million comparison against every other text model.
100K input + 25K output
$0.40
A compact chat, summarization, or analysis workload.
10M input + 2M output
$36.00
A monthly production estimate for heavier RAG or agent traffic.
75% cached input + 250K output
$2.88
Cached input is about 75% cheaper than standard input at list price.
Calculator for o3
Enter your own input, output, and cached-token assumptions. This calculator is preloaded with only o3, so the result stays focused on this model.
Input cost
$2.00
Output cost
$8.00
Total
$10.00
Price history
No list-price movement across 209 daily snapshots from 2026-04-16 to 2026-11-11.
When to use o3
Good fit
- code generation, debugging, and agentic development work where output quality affects engineering time
- reasoning-heavy prompts, planning, analysis, and multi-step tool use
Be careful with
- blind migration without testing your own prompts, latency, and failure modes