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Moonshot AI (Kimi)

kimi-k2.5

VS
xAI

Grok 4.20

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, Grok 4.20 is the premium intelligence choice, scoring 1.1% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: kimi-k2.5 is 2.5x cheaper to run. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, kimi-k2.5 offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of Grok 4.20 fully justifies the cost.

Model Specs

kimi-k2.5

Benchmarks & Scores

Coding (swe-bench-pro)
50.7%
Reasoning (gpqa-diamond)
87.6%

Cost & Performance

Cost (per 1M tokens)2.5x cheaper
$1.20Input: $0.60 | Output: $3.00
Speed
193 tps
Context Window
262.14k tokens
Model Specs

Grok 4.20

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+1.1%)
51.8%
Reasoning (gpqa-diamond)Winner (+2.4%)
90%

Cost & Performance

Cost (per 1M tokens)
$3.00Input: $2.00 | Output: $6.00
Speed1.2x faster
233 tps
Context WindowLarger
1M tokens

Frequently Asked Questions

kimi-k2.5 is cheaper than Grok 4.20. kimi-k2.5 has a blended cost of $1.20/1M tokens, which is about 2.5x cheaper than Grok 4.20 at $3.00/1M tokens.

Grok 4.20 is faster than kimi-k2.5. Grok 4.20 generates 233 tokens per second (tps) compared to kimi-k2.5 which generates 193 tokens per second.

Grok 4.20 is better for coding tasks. It scores 51.8% on coding evaluations (swe-bench-pro) compared to kimi-k2.5 which scores 50.7%.

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