O3 vs GPT-5.4: API Pricing Compared
Side-by-side API pricing and capabilities for O3 and GPT-5.4. Both are available through Riven behind one OpenAI-compatible endpoint — at vendor list price with transparent per-token pricing, or a flat $3 per million tokens on pay-as-you-go.
| O3 | GPT-5.4 | |
|---|---|---|
| Input price ($/1M tokens) | $2.00 | $2.50 |
| Output price ($/1M tokens) | $8.00 | $15.00 |
| Vendor | openai | openai |
| Capabilities | chat, reasoning | chat, reasoning |
FAQ
Which is cheaper, O3 or GPT-5.4?
On Riven both are billed at vendor list price with transparent per-token pricing: O3 is $2.00/1M input and $8.00/1M output; GPT-5.4 is $2.50/1M input and $15.00/1M output. On the pay-as-you-go plan, every model is a flat $3 per million tokens.
Can I use O3 and GPT-5.4 with one API key?
Yes. One Riven key reaches both models through the same OpenAI-compatible endpoint, so you can A/B them by changing only the model id.
Is there a markup on these prices?
No. Riven lists these models at vendor list price with transparent per-token pricing. Pay-as-you-go users instead pay a flat $3 per million tokens across every model.