Kimi K3.1 Pro vs GPT-6.1 Sol — LLM API Cost Comparison
Compare Kimi K3.1 Pro (Kimi (Moonshot AI)) vs GPT-6.1 Sol (OpenAI) on cost per million tokens, context window, and monthly spend.
Pricing data updated 2026-11-02 · Pricing may change — use the calculator for current estimates
- Input
- $2/1M tokens
- Output
- $10/1M tokens
- Context
- 1M tokens
- Released
- 2026-10
Auto-added 2026-11; set isCurrent: true after review
- Input
- $2/1M tokens
- Output
- $10/1M tokens
- Context
- 1M tokens
- Released
- 2026-09
Auto-added 2026-11; set isCurrent: true after review
Monthly Cost by Usage Tier (70% input / 30% output ratio)
| Usage | Kimi K3.1 Pro | GPT-6.1 Sol | Cheaper by |
|---|---|---|---|
| Light (1M tokens) | $4.40 | $4.40 | Equal |
| Moderate (10M tokens) | $44.00 | $44.00 | Equal |
| Heavy (100M tokens) | $440 | $440 | Equal |
| Very Heavy (1B tokens) | $4,400 | $4,400 | Equal |
Frequently Asked Questions
Which is cheaper — Kimi K3.1 Pro or GPT-6.1 Sol?
Both models have the same input rate of $2/1M tokens. Both models have the same output rate of $10/1M tokens. Total cost depends on the input and output mix.
What is the context window difference between Kimi K3.1 Pro and GPT-6.1 Sol?
Kimi K3.1 Pro supports 1,048,576 tokens per request; GPT-6.1 Sol supports 1,050,000 tokens. GPT-6.1 Sol has the longer listed context window.
When should I choose Kimi K3.1 Pro over GPT-6.1 Sol?
Choose Kimi K3.1 Pro (Kimi (Moonshot AI)) if you prefer Kimi (Moonshot AI)'s ecosystem, tooling, or reliability track record. Auto-added 2026-11; set isCurrent: true after review. Choose GPT-6.1 Sol (OpenAI) if Auto-added 2026-11; set isCurrent: true after review. the price/performance fits your workload better. Use this calculator to find the break-even point for your exact token volume.
How much does 1 billion tokens cost on Kimi K3.1 Pro vs GPT-6.1 Sol?
At 700M input + 300M output tokens (1B total): Kimi K3.1 Pro costs $4400; GPT-6.1 Sol costs $4400. The difference is $0/billion tokens at this 70/30 input/output ratio.