Gemini 3 Flash Preview vs Gemini 3.1 Pro Preview
Gemini 3 Flash Preview (Google) versus Gemini 3.1 Pro Preview (Google): API pricing, context window, capabilities and uptime, from the same data as each model page, at the SoleAPI default channel price. Input costs 0.8 Credits / M for Gemini 3 Flash Preview and 3.2 Credits / M for Gemini 3.1 Pro Preview, so Gemini 3 Flash Preview is 75% cheaper. Context windows are 1M and 1M.
Gemini 3 Flash Previewgemini-3-flash-previewGemini 3.1 Pro Previewgemini-3.1-pro-previewSpecs side by side
| Item | Gemini 3 Flash Previewgemini-3-flash-preview | Gemini 3.1 Pro Previewgemini-3.1-pro-preview |
|---|---|---|
| Input (prompt) · Credits / M | 0.8≈ $0.121 | 3.2≈ $0.485 |
| Output (completion) · Credits / M | 4.8≈ $0.727 | 19.2≈ $2.91 |
| Cache read · Credits / M | 0.08 | 0.32 |
| Context window | 1M | 1M |
| Max output | 64K | 64K |
| 7-day uptime | 97.7% | 90.1% |
| Latest probe latency | 4.46 s | 3.07 s |
| Measured throughput | 70.8 t/s | 76.7 t/s |
| Protocols | Anthropic Messages / Gemini generateContent | Anthropic Messages / Gemini generateContent |
| Sample monthly cost (10M in + 2M out) | 17.6≈ $2.67 | 70.4≈ $10.66 |
Prices are the SoleAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from SoleAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which is cheaper, Gemini 3 Flash Preview or Gemini 3.1 Pro Preview?
At the SoleAPI default channel price, Gemini 3 Flash Preview input costs 0.8 Credits / M and Gemini 3.1 Pro Preview input costs 3.2 Credits / M, so Gemini 3 Flash Preview is 75% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, Gemini 3 Flash Preview or Gemini 3.1 Pro Preview?
Gemini 3 Flash Preview offers 1M tokens, Gemini 3.1 Pro Preview offers 1M tokens.
Can I switch between Gemini 3 Flash Preview and Gemini 3.1 Pro Preview at any time?
Yes. SoleAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.
How do the capabilities of Gemini 3 Flash Preview and Gemini 3.1 Pro Preview differ?
Their capability flags are identical. Every other capability is either supported by both or by neither; see the capability table above.
More comparisons
One API key for both Gemini 3 Flash Preview and Gemini 3.1 Pro Preview
Free credits on sign-up, pay as you go, no monthly fee.