Grok Code Fast 1 vs Kimi K2 Thinking
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
xAI · Aug 2025
A speed-first coding model built for agentic IDE loops, popular as a cheap fast tier in Cursor and similar tools.
Moonshot AI · Nov 2025
A trillion-parameter open reasoning agent that can chain 200–300 tool calls — the open-weights agentic standout of late 2025.
The verdict
Kimi K2 Thinking wins 1 of the 1 benchmarks these models share, against 0 for Grok Code Fast 1. Grok Code Fast 1 is about 2.0x cheaper per blended million tokens (3:1 input:output mix). Kimi K2 Thinking also takes 262K of context versus 256K for Grok Code Fast 1. And Kimi K2 Thinking is open-weights (Modified MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
Benchmark head-to-head 0–1
Specs & pricing
| Grok Code Fast 1 | Kimi K2 Thinking | |
|---|---|---|
| modhub Index | — | 67.6 |
| Input price / 1M | $0.2 | $0.6 |
| Output price / 1M | $1.5 | $2.5 |
| Context window | 256K | 262K |
| Max output | — | — |
| Open weights | no | yes (Modified MIT) |
| Reasoning model | yes | yes |
| Multimodal input | text | text |
| Knowledge cutoff | Aug 2025 | Apr 2025 |
| Released | Aug 2025 | Nov 2025 |
| Example monthly cost* | $4.25 | $9.75 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Grok Code Fast 1 or Kimi K2 Thinking?
- Kimi K2 Thinking wins 1 of the 1 benchmarks these models share, against 0 for Grok Code Fast 1. Grok Code Fast 1 is about 2.0x cheaper per blended million tokens (3:1 input:output mix). Kimi K2 Thinking also takes 262K of context versus 256K for Grok Code Fast 1. And Kimi K2 Thinking is open-weights (Modified MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
- Which is cheaper, Grok Code Fast 1 or Kimi K2 Thinking?
- Grok Code Fast 1 costs $0.2/$1.5 per million input/output tokens, while Kimi K2 Thinking costs $0.6/$2.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $4.25 versus $9.75.
- Which model is better for coding, Grok Code Fast 1 or Kimi K2 Thinking?
- On SWE-bench Verified — the standard agentic-coding benchmark — Kimi K2 Thinking scores 71.3% versus 70.8% for Grok Code Fast 1, making Kimi K2 Thinking the stronger pick for coding agents.