Gemini 2.5 Flash Image vs Gemini 3.1 Pro (Preview)
Gemini 2.5 Flash Image (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 WandAPI default channel price. Input costs 0.6 Credits / M for Gemini 2.5 Flash Image and 4 Credits / M for Gemini 3.1 Pro (Preview), so Gemini 2.5 Flash Image is 85% cheaper. Context windows are 64K and 1M.
Gemini 2.5 Flash Imagegemini-2.5-flash-imageGemini 3.1 Pro (Preview)gemini-3.1-pro-previewSpecs side by side
| Item | Gemini 2.5 Flash Imagegemini-2.5-flash-image | Gemini 3.1 Pro (Preview)gemini-3.1-pro-preview |
|---|---|---|
| Input (prompt) · Credits / M | 0.6≈ $0.0912 | 4≈ $0.608 |
| Output (completion) · Credits / M | 5≈ $0.76 | 24≈ $3.65 |
| Cache read · Credits / M | — | 0.4 |
| Context window | 64K | 1M |
| Max output | 32K | 64K |
| 7-day uptime | — | 93.1% |
| Latest probe latency | — | 3.4s |
| Measured throughput | 198.3 t/s | 5.1 t/s |
| Protocols | Gemini generateContent | Gemini generateContent / OpenAI Responses |
| Sample monthly cost (10M in + 2M out) | 16≈ $2.43 | 88≈ $13.37 |
Prices are the WandAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from WandAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which is cheaper, Gemini 2.5 Flash Image or Gemini 3.1 Pro (Preview)?
At the WandAPI default channel price, Gemini 2.5 Flash Image input costs 0.6 Credits / M and Gemini 3.1 Pro (Preview) input costs 4 Credits / M, so Gemini 2.5 Flash Image is 85% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, Gemini 2.5 Flash Image or Gemini 3.1 Pro (Preview)?
Gemini 2.5 Flash Image offers 64K tokens, Gemini 3.1 Pro (Preview) offers 1M tokens.
Can I switch between Gemini 2.5 Flash Image and Gemini 3.1 Pro (Preview) at any time?
Yes. WandAPI 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 Flash Image and Gemini 3.1 Pro (Preview) differ?
Only Gemini 3.1 Pro (Preview): Function Calling, Reasoning, Audio, Video. 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 Flash Image and Gemini 3.1 Pro (Preview)
Free credits on sign-up, pay as you go, no monthly fee.