Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs Kimi K3.1 Pro
Price, context window & benchmark comparison
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Verdict: Nano Banana 2 (Gemini 3.1 Flash Image Preview) is 3.6× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix. Kimi K3.1 Pro has the larger context window (1M vs 66K).
| Nano Banana 2 (Gemini 3.1 Flash Image Preview) | Kimi K3.1 Pro | |
|---|---|---|
| Input price / 1M | $0.50 | $2.00 |
| Output price / 1M | $3.00 | $10.00 |
| Blended price (3:1) | $1.13 | $4.00 |
| Cached input / 1M | — | $0.20 |
| Context window | 66K | 1M |
| Max output | 59K | 944K |
| Intelligence index | — | 46.5 |
| Coding index | — | — |
| Providers | — | 23 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | No | Yes |
| Released | 2026-02-26 | 2026-10-23 |
| Retirement | — | — |
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FAQ
Which is cheaper, Nano Banana 2 (Gemini 3.1 Flash Image Preview) or Kimi K3.1 Pro?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is 3.6× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix.
Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs Kimi K3.1 Pro: which has a bigger context window?
Nano Banana 2 (Gemini 3.1 Flash Image Preview): 65,536 tokens. Kimi K3.1 Pro: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Nano Banana 2 (Gemini 3.1 Flash Image Preview) ≈ $2,500, Kimi K3.1 Pro ≈ $9,000.
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