o3 pricing & specs
OpenAI · released 2025-04-16 · ● verified 2026-10-11
input / 1M$2.00
output / 1M$8.00
context200K
max output100K
// price history ($/1M tokens)
// cheaper or similar alternatives
| model | in | out | ctx | vs o3 |
|---|---|---|---|---|
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | 1.05M | −95% |
| Claude Haiku 5.5 | $0.10 | $0.50 | 1M | −94.3% |
| GPT-6 Luna | $0.10 | $0.50 | 1.05M | −94.3% |
| GLM-5.3-Flash | $0.15 | $0.50 | 1M | −93.2% |
| GPT-5.6 Luna | $0.20 | $1.20 | 1.05M | −87.1% |
// price by host
| host | in $/1M | out $/1M |
|---|---|---|
| Azure | $2.00 | $8.00 |
// faq
How much does o3 cost?
o3 costs $2.00 per million input tokens and $8.00 per million output tokens. At 50M input and 10M output tokens per month that is about $180.
What is the context window of o3?
200K tokens, with up to 100K output tokens per request.
Does o3 support prompt caching?
Yes. Cached input tokens cost $0.50 per million.
What are cheaper alternatives to o3?
Gemini 2.5 Flash-Lite ($0.10 in / $0.40 out), Claude Haiku 5.5 ($0.10 in / $0.50 out), GPT-6 Luna ($0.10 in / $0.50 out) offer the same input types and capabilities for less.
// spec sheet
- input / 1M
- $2.00
- output / 1M
- $8.00
- cache read / 1M
- $0.50
- blended (3:1)
- $3.50
- context
- 200K
- max output
- 100K
- input types
- text · image · pdf
- reasoning
- yes
- tool calling
- yes
- structured output
- yes
- open weights
- no
- knowledge cutoff
- 2024-05
- price source
- OpenAI
// cost calculator
| model | in $/1M | out $/1M | = monthly |
|---|---|---|---|
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | $9.00 |
| Claude Haiku 5.5 | $0.10 | $0.50 | $10.00 |
| GPT-6 Luna | $0.10 | $0.50 | $10.00 |
| o3 | $2.00 | $8.00 | $180 |
Base-tier list prices. Long-context tiers, caching and batch discounts are not included.