o3
Compare 6 API providers supporting o3. Calculations are based on the latest 2026 pricing data.
Ctx: 200,000reasoningstreamingfunction_calling
Cheapest Input Price
$0.4 / 1M token
Cheapest Output Price
$1.6 / 1M token
Supported API Providers
6
API Providers Comparison
| Provider | Input ($/1M) | Output ($/1M) |
|---|---|---|
 老张AI (laozhang.ai) Lowest | $0.4 | $1.6 |
 OpenRouter | $2 | $8 |
 API易 | $2 | $8 |
 OpenAI | $2 | $8 |
 AIHubMix | $2.2 | $8.8 |
 CloseAI | $3 | $12 |
Frequently Asked Questions
How much does 1M tokens of o3 cost?
The cheapest API provider offers o3 at $0.4 per 1M input tokens. Prices may vary heavily depending on the official vendor and routing platform you choose.
Who is the cheapest API provider for o3?
Currently, 老张AI (laozhang.ai) offers the most competitive pricing for o3. Compare all 6 providers above to find the best fit for your stability and cost requirements.