GPT-6 Luna vs Kimi K3.1 Pro
Short answer
GPT-6 Luna is about 20x cheaper than Kimi K3.1 Pro for a typical 3:1 input-to-output token mix ($0.20 vs $4 per 1M tokens).
Prices updated Nov 1, 2026 (APIpulse, CC BY 4.0) · Benchmarks: ARC Prize, Vals.ai · all models
| GPT-6 Lunacheaper | Kimi K3.1 Pro | |
|---|---|---|
| Provider | OpenAI | Moonshot |
| Input / 1M tokens | $0.10 | $2 |
| Output / 1M tokens | $0.50 | $10 |
| Blended (3:1) / 1M | $0.20 | $4 |
| Context window | 1.05M | 1M |
| ARC-AGI-2 | 59.3% (Max) | — |
| SWE-bench Verified | — | — |
API cost calculator
Enter your monthly usage in millions of tokens (1M tokens ≈ 750,000 words).
GPT-6 Lunacheapest$2 / month$24 / 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, GPT-6 Luna or Kimi K3.1 Pro?
GPT-6 Luna is about 20x cheaper than Kimi K3.1 Pro for a typical 3:1 input-to-output token mix ($0.20 vs $4 per 1M tokens)..
How much do GPT-6 Luna and Kimi K3.1 Pro cost per month?
For 10M input and 2M output tokens a month: GPT-6 Luna costs $2 and Kimi K3.1 Pro costs $40.
More: GPT-6 Luna pricing · Kimi K3.1 Pro pricing · all API prices
Benchmarks updated Nov 2, 2026.