Gemini 3.8 Flash vs Kimi K3.1 Pro
Short answer
Gemini 3.8 Flash is about 3x cheaper than Kimi K3.1 Pro for a typical 3:1 input-to-output token mix ($1.50 vs $4 per 1M tokens).
Prices updated Nov 13, 2026 (APIpulse, CC BY 4.0) · Benchmarks: ARC Prize, Vals.ai · all models
| Gemini 3.8 Flashcheaper | Kimi K3.1 Pro | |
|---|---|---|
| Provider | Moonshot | |
| Input / 1M tokens | $0.75 | $2 |
| Output / 1M tokens | $3.75 | $10 |
| Blended (3:1) / 1M | $1.50 | $4 |
| Context window | 1M | 1M |
| ARC-AGI-2 | 89.2% (High) | — |
| SWE-bench Verified | 80% | — |
API cost calculator
Enter your monthly usage in millions of tokens (1M tokens ≈ 750,000 words).
Gemini 3.8 Flashcheapest$15 / month$180 / year
Kimi K3.1 Pro$40 / month$480 / year
Standard rates; batch processing and prompt caching can lower the bill.
Frequently asked questions
Which is cheaper, Gemini 3.8 Flash or Kimi K3.1 Pro?
Gemini 3.8 Flash is about 3x cheaper than Kimi K3.1 Pro for a typical 3:1 input-to-output token mix ($1.50 vs $4 per 1M tokens)..
How much do Gemini 3.8 Flash and Kimi K3.1 Pro cost per month?
For 10M input and 2M output tokens a month: Gemini 3.8 Flash costs $15 and Kimi K3.1 Pro costs $40.
More: Gemini 3.8 Flash pricing · Kimi K3.1 Pro pricing · all API prices
Benchmarks updated Nov 15, 2026.