GPT-5.6 vs Gemini-3.6-Flash: API Pricing Compared
Side-by-side API pricing and capabilities for GPT-5.6 and Gemini-3.6-Flash. Both are available through Riven behind one OpenAI-compatible endpoint — at vendor list price with transparent per-token pricing, or a flat $3 per million tokens on pay-as-you-go.
| GPT-5.6 | Gemini-3.6-Flash | |
|---|---|---|
| Input price ($/1M tokens) | $5.00 | $1.50 |
| Output price ($/1M tokens) | $30.00 | $7.50 |
| Vendor | provider | |
| Capabilities | chat, reasoning | chat, reasoning, vision, coding |
Model pages: GPT-5.6 · Gemini-3.6-Flash
FAQ
Which is cheaper, GPT-5.6 or Gemini-3.6-Flash?
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; Gemini-3.6-Flash is $1.50/1M input and $7.50/1M output. On the pay-as-you-go plan, every model is a flat $3 per million tokens.
Can I use GPT-5.6 and Gemini-3.6-Flash 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.