Skip to main content

Grok 4.1 Fast (Reasoning) vs Kimi K2.5

Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.

Benchmark data for one or both models is coming soon. This page currently shows metadata and pricing where BenchLM has it, and score-level comparisons will populate as public benchmark results land.

Grok 4.1 Fast (Reasoning)

17

VS

Kimi K2.5

64

0 categoriesvs0 categories

Verified leaderboard positions: Grok 4.1 Fast (Reasoning) unranked · Kimi K2.5 #11

Benchmark data for Grok 4.1 Fast (Reasoning) and Kimi K2.5 is coming soon on BenchLM.

Category Radar

Head-to-Head by Category

Operational Comparison

Grok 4.1 Fast (Reasoning)

Kimi K2.5

Price (per 1M tokens)

N/A

$0.6 / $3

Speed

N/A

45 t/s

Latency (TTFT)

N/A

2.38s

Context Window

2M

256K

Quick Verdict

Benchmark data for Grok 4.1 Fast (Reasoning) and Kimi K2.5 is coming soon on BenchLM.

BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.

Grok 4.1 Fast (Reasoning) has the larger context window at 2M, compared with 256K for Kimi K2.5.

Benchmark Deep Dive

Frequently Asked Questions (3)

Can I compare Grok 4.1 Fast (Reasoning) and Kimi K2.5 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 4.1 Fast (Reasoning) and Kimi K2.5 today?

Kimi K2.5: $0.60 input / $3.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

Self-host vs API cost

Estimates at 50,000 req/day · 1000 tokens/req average.

Grok 4.1 Fast (Reasoning)
API / mo$0
Self-host / moN/A
Break-even
Proprietary model — self-hosting not applicable.
Kimi K2.5
API / mo$2,700
Self-host / mo$5,221
Break-even132M/day
Model the full break-even

Related Comparisons

Last updated: April 24, 2026

The AI models change fast. We track them for you.

For engineers, researchers, and the plain curious — a weekly brief on new models, ranking shifts, and pricing changes.

Free. No spam. Unsubscribe anytime.