Model comparison
Grok Code Fast 1 vs Kimi K2
Head-to-head evidence from 11 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok Code Fast 1 #180 (Supported); Kimi K2 #189 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok Code Fast 1 and Kimi K2 share 11 comparable benchmark results. 0 of 8 categories are comparable. 1 result is unique to Grok Code Fast 1; 3 to Kimi K2.
Updated July 20, 2026- Shared results
- 11
- Grok Code Fast 1 only
- 1
- Kimi K2 only
- 3
- Comparable categories
- 0 / 8
Benchmark data for Grok Code Fast 1 and Kimi K2 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 5 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Kimi K2 is priced at $0.60 input / $2.50 output per 1M tokens, versus $0.20 input / $1.50 output per 1M tokens for Grok Code Fast 1. Grok Code Fast 1 has the larger context window at 256K, compared with 128K for Kimi K2.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Grok Code Fast 1 | Δ | Kimi K2 |
|---|---|---|---|
| Coding | Grok Code Fast 170.8 | MarginNo overlap | Kimi K2Not measured |
| Math | Grok Code Fast 1Not measured | MarginNo overlap | Kimi K216.1 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok Code Fast 1 | Kimi K2 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok Code Fast 1$0.2 input / $1.5 output | Kimi K2$0.6 input / $2.5 output | Grok Code Fast 1 has the lower combined listed price. |
| Generation speedtokens per second | Grok Code Fast 1172 tok/s | Kimi K243 tok/s | Grok Code Fast 1 has the higher measured throughput. |
| First-answer latencyseconds to first token | Grok Code Fast 12.81 s | Kimi K21.51 s | Kimi K2 reaches the first token sooner. |
| Context windowmaximum listed tokens | Grok Code Fast 1256K | Kimi K2128K | Grok Code Fast 1 lists the larger context window. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Grok Code Fast 1 | Kimi K2 | Result |
|---|---|---|---|
| τ²-bench resultsSource | 75.7% | 61.1% | Grok Code Fast 1 leads |
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Grok Code Fast 1 | Kimi K2 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 21.6% | 19.4% | Grok Code Fast 1 leads |
| AA-GPQA DiamondSource | 72.7% | 76.6% | Kimi K2 leads |
| AA-HLESource | 7.5% | 7.0% | Grok Code Fast 1 leads |
| AA-Omniscience IndexSource | -36.0% | -27.5% | Kimi K2 leads |
| AA-Omniscience AccuracySource | 23.8% | 26.8% | Kimi K2 leads |
| AA-Omniscience Hallucination RateSource | 78.5% | 74.2% | Kimi K2 leads |
Math2 benchmarks
Multimodal1 benchmarks
| Benchmark | Grok Code Fast 1 | Kimi K2 | Result |
|---|---|---|---|
| Design Arena WebsiteSource | — | 1083 | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Grok Code Fast 1 | Kimi K2 | Result |
|---|---|---|---|
| AA-IFBenchSource | 41.4% | 41.5% | Kimi K2 leads |
Frequently Asked Questions (3)
Can I compare Grok Code Fast 1 and Kimi K2 on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Grok Code Fast 1 and Kimi K2 today?
Grok Code Fast 1: $0.20 input / $1.50 output per 1M tokens Kimi K2: $0.60 input / $2.50 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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