Gemini 2.5 Pro vs Gemini 3.1 Pro Preview
Gemini 2.5 Pro (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 2 Credits / M for Gemini 2.5 Pro and 3.2 Credits / M for Gemini 3.1 Pro Preview, so Gemini 2.5 Pro is 38% cheaper. Context windows are 1M and 1M.
Gemini 2.5 Progemini-2.5-proGemini 3.1 Pro Previewgemini-3.1-pro-previewSpecs side by side
| Item | Gemini 2.5 Progemini-2.5-pro | Gemini 3.1 Pro Previewgemini-3.1-pro-preview |
|---|---|---|
| Input (prompt) · Credits / M | 2≈ $0.303 | 3.2≈ $0.485 |
| Output (completion) · Credits / M | 16≈ $2.42 | 19.2≈ $2.91 |
| Cache read · Credits / M | 0.2 | 0.32 |
| Context window | 1M | 1M |
| Max output | 64K | 64K |
| 7-day uptime | — | 90.1% |
| Latest probe latency | — | 3.07 s |
| Measured throughput | 60.0 t/s | 76.7 t/s |
| Protocols | Anthropic Messages / Gemini generateContent | Anthropic Messages / Gemini generateContent |
| Sample monthly cost (10M in + 2M out) | 52≈ $7.87 | 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 2.5 Pro or Gemini 3.1 Pro Preview?
At the SoleAPI default channel price, Gemini 2.5 Pro input costs 2 Credits / M and Gemini 3.1 Pro Preview input costs 3.2 Credits / M, so Gemini 2.5 Pro is 38% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, Gemini 2.5 Pro or Gemini 3.1 Pro Preview?
Gemini 2.5 Pro offers 1M tokens, Gemini 3.1 Pro Preview offers 1M tokens.
Can I switch between Gemini 2.5 Pro 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 2.5 Pro 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 2.5 Pro and Gemini 3.1 Pro Preview
Free credits on sign-up, pay as you go, no monthly fee.