Kimi K2.5 vs Grok Build 0.1
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | Kimi K2.5 | Grok Build 0.1 |
|---|---|---|
| Provider | Moonshot AI | xAI |
| Input Price (1M) | $0.60 | $1.00 |
| Output Price (1M) | $3.00 | $2.00 |
| Context Window | 262,144 | 256,000 |
Verdict
Kimi K2.5 costs $0.60 per 1M input tokens and $3.00 per 1M output tokens. Grok Build 0.1 costs $1.00 per 1M input tokens and $2.00 per 1M output tokens. Kimi K2.5 is 40% cheaper on input tokens than Grok Build 0.1. For output tokens, Grok Build 0.1 is the more affordable option at $2.00/1M vs $3.00.
On context window, Kimi K2.5 supports 262,144 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Kimi K2.5
- ✓ You need the lowest input token cost ($ 0.60/1M)
- ✓ You need a larger context window (262,144 tokens)
- ✓ You are already integrated with Moonshot AI
When to choose Grok Build 0.1
- ✓ Your workload is output-heavy — Grok Build 0.1 generates text cheaper
- ✓ You are already integrated with xAI
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.
Frequently Asked Questions
Is Kimi K2.5 cheaper than Grok Build 0.1? ▼
Kimi K2.5 is cheaper on input tokens at $0.60/1M vs $1.00/1M for Grok Build 0.1 — a 40% saving.
What is the context window of Kimi K2.5 vs Grok Build 0.1? ▼
Kimi K2.5 has a 262,144-token context window. Grok Build 0.1 has a 256,000-token context window. Kimi K2.5 supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: Kimi K2.5 or Grok Build 0.1? ▼
The best choice depends on your use case. For cost efficiency on input tokens, Kimi K2.5 is the cheaper option. For maximum context length, Kimi K2.5 supports 262,144 tokens. Use the comparison table above to find the right fit for your workload.