OpenAI: o3
by OpenAIOpenAI: o3 is a large language model from OpenAI. It costs $2.00 per million input tokens and $8.00 per million output tokens. Its context window is 200K tokens.
- Input / 1M tokens
- $2.00
- Output / 1M tokens
- $8.00
- Cached input / 1M
- $0.500
- Context window
- 200K
On repeated prefixes
tokens
This model also charges $0.01 per search request
That is $10.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.006, so the search fee is 1.7× the token cost. Per-token rankings elsewhere ignore this entirely.
Who serves it cheapest
1 hosts serve o3. Same weights, same API - the price difference is pure margin and routing.
| Provider | Input / 1M | Output / 1M | Context | Throughput | Uptime 24h |
|---|---|---|---|---|---|
| OpenAICheapest | $2.00 | $8.00 | 200K | - | 100.0% |
About o3
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....
Specifications
| Model ID | openai/o3 |
|---|---|
| Provider | OpenAI |
| Context window | 200K tokens |
| Max output | 100K tokens |
| Input modalities | image, text, file |
| Output modalities | text |
| Knowledge cutoff | 2024-06-30 |
| Open weights | No |
| Released | April 16, 2025 |
Cheaper alternatives
Models that cost less than o3 while keeping at least half its context window and every input modality it supports.
Frequently asked
How much does OpenAI: o3 cost?
$2.00 per million input tokens and $8.00 per million output tokens. Cached input reads cost $0.500 per million tokens.
What is the context window of OpenAI: o3?
200K tokens, with up to 100K tokens of output per request.
Does OpenAI: o3 have extra fees beyond per-token pricing?
Yes. OpenAI: o3 charges $0.01 per search request - $10.00 per 1,000 requests - on top of $2.00 per million input tokens and $8.00 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 1.7× the token cost.
Confirm against the source: OpenAI official pricing.