Gemini 2.5 Flash vs Gemini 3.8 Flash
Gemini 2.5 Flash (Google) versus Gemini 3.8 Flash (Google): API pricing, context window, capabilities and uptime, from the same data as each model page, at the SoleAPI default channel price. Input costs 0.48 Credits / M for Gemini 2.5 Flash and 1.2 Credits / M for Gemini 3.8 Flash, so Gemini 2.5 Flash is 60% cheaper. Context windows are 1M and 1M.
Specs side by side
| Item | Gemini 2.5 Flashgemini-2.5-flash | Gemini 3.8 Flashgemini-3.8-flash |
|---|---|---|
| Input (prompt) · Credits / M | 0.48≈ $0.0724 | 1.2≈ $0.181 |
| Output (completion) · Credits / M | 4≈ $0.604 | 6≈ $0.906 |
| Cache read · Credits / M | 0.048 | 0.12 |
| Context window | 1M | 1M |
| Max output | 64K | 64K |
| 7-day uptime | 99.0% | — |
| Latest probe latency | 1.74 s | — |
| Measured throughput | 145.7 t/s | 34.1 t/s |
| Protocols | Anthropic Messages / Gemini generateContent | Anthropic Messages / Gemini generateContent |
| Sample monthly cost (10M in + 2M out) | 12.8≈ $1.93 | 24≈ $3.62 |
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 Flash or Gemini 3.8 Flash?
At the SoleAPI default channel price, Gemini 2.5 Flash input costs 0.48 Credits / M and Gemini 3.8 Flash input costs 1.2 Credits / M, so Gemini 2.5 Flash is 60% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, Gemini 2.5 Flash or Gemini 3.8 Flash?
Gemini 2.5 Flash offers 1M tokens, Gemini 3.8 Flash offers 1M tokens.
Can I switch between Gemini 2.5 Flash and Gemini 3.8 Flash 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 Flash and Gemini 3.8 Flash differ?
Only Gemini 3.8 Flash: Video, File Input. 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 and Gemini 3.8 Flash
Free credits on sign-up, pay as you go, no monthly fee.