o3 pricing
OpenAI ·
o3 ·
200K context
· 59th cheapest of 89 current models
Estimate o3 for your workload Source and check date
Rates last checked against the vendor’s own published pricing on 2026-11-10.
What o3 costs
| Rate | Per 1M tokens | Per 1K tokens | What it covers |
|---|---|---|---|
| Input | $2 | $0.002 | Every token you send: prompt, history, documents. |
| Output | $8 | $0.008 | Every token the model generates, including hidden reasoning tokens. |
| Cached input | $0.5 | $0.0005 | Input served from the provider’s prompt cache. |
What that means in practice
The same three workloads are costed on every model page, so these numbers are directly comparable across the catalog. No prompt caching and no batch discount is assumed — the figures are what you pay before you optimize anything.
Support chatbot
2,500 six-turn conversations a day
$7,245 / month
$0.097 per conversation · $86,940 a year
An 800-token system prompt, 400-token questions and 900-token answers, over six turns — each turn re-sending everything before it.
Document summarizer
1,000 single-shot summaries a day
$924 / month
$0.031 per conversation · $11,088 a year
One 12,000-token document in, an 800-token summary out, no conversation history. The case where input dominates the bill.
Coding agent
200 twelve-turn sessions a day
$5,256 / month
$0.876 per conversation · $63,072 a year
A 3,000-token system prompt, 1,500-token instructions and 2,500-token responses over twelve turns. Long sessions are where the quadratic cost of re-sent history stops being theoretical.
Change the assumptions in the calculator
Cheaper models in the catalog
Nothing cheaper is scored as highly as o3, so these are simply the cheaper options, best-scored first. Trading down here is a real trade.
| Model | Input | Output | Blended saving | |
|---|---|---|---|---|
| GPT-6.1 Terra | $1 | $5 | 43% | |
| DeepSeek V4 Flash | $0.3 | $1.2 | 85% | |
| MiMo V2.6 Pro | $0.435 | $0.87 | 84% | |
| GLM-5.3 | $1.4 | $4.4 | 39% | |
| Qwen 3.8 Max | $2 | $6 | 14% |
Specification
| Context window | 200K tokens |
|---|---|
| Maximum output | 100K tokens |
| Provider | OpenAI |
| Status | Current |
| Reasoning model | Yes |
| Vision | Yes |
| Token counting | Exact, via o200k_base |
Price history
PromptSpend has recorded o3 since 2026-08-02, and none of its rates has changed in that time. Tracking began on 2026-08-02, so anything the vendor did before then is not on record here.
Every row, with the commit that published it, is in the price-history dataset; price news is also available as an Atom feed.
Where these numbers come from
Last checked against its source on 2026-11-10. Source of record: the vendor’s own published pricing.
The vendor page a human checked
Regional and data-residency premiums, priority tiers, server-side tool fees and negotiated discounts are not included. Prices change without notice; this page is rebuilt every time the catalog does.
Common questions
How much does o3 cost?
o3 costs $2 per 1M input tokens and $8 per 1M output tokens at the standard tier, as last checked against the vendor’s own published pricing on 2026-11-10.
How much does o3 cost to run for a month?
On PromptSpend's three standard workloads, o3 costs about $7,245 for a support chatbot, $924 for a document summarizer and $5,256 for a coding agent each month. No prompt caching and no batch discount is assumed, and the same workloads are costed on every model page, so the figures compare directly.
Is there a cheaper alternative to o3?
Yes, though none is scored as highly. The cheaper options, best-scored first, include GPT-6.1 Terra ($1 in, $5 out), DeepSeek V4 Flash ($0.3 in, $1.2 out) and MiMo V2.6 Pro ($0.435 in, $0.87 out), so trading down is a real trade.
How large is the context window of o3?
o3 accepts up to 200K tokens of context and can produce up to 100K tokens of output.
Has the price of o3 changed?
No vendor change is on record. PromptSpend has recorded o3 since 2026-08-02 and none of its rates has moved. PromptSpend began tracking prices on 2026-08-02, so earlier changes are not on record.
Where do the prices for o3 come from?
They come from the vendor’s own published pricing and were last checked on 2026-11-10. Regional and data-residency premiums, priority tiers, server-side tool fees and negotiated discounts are not included.