GPT-5.6 vs O4-Mini: API Pricing Compared
Side-by-side API pricing and capabilities for GPT-5.6 and O4-Mini. Both are available through Riven behind one OpenAI-compatible endpoint — at vendor list price with transparent per-token pricing, or a flat $3 per million tokens on pay-as-you-go.
| GPT-5.6 | O4-Mini | |
|---|---|---|
| Input price ($/1M tokens) | $5.00 | $1.10 |
| Output price ($/1M tokens) | $30.00 | $4.40 |
| Vendor | provider | openai |
| Capabilities | chat, reasoning | chat, reasoning, fast |
Model pages: GPT-5.6 · O4-Mini
FAQ
Which is cheaper, GPT-5.6 or O4-Mini?
On Riven both are billed at vendor list price with transparent per-token pricing: GPT-5.6 is $5.00/1M input and $30.00/1M output; O4-Mini is $1.10/1M input and $4.40/1M output. On the pay-as-you-go plan, every model is a flat $3 per million tokens.
Can I use GPT-5.6 and O4-Mini 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.