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Moonshot AI (Kimi)

kimi-k2.5

VS
OpenAI

GPT-5.4 mini

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, GPT-5.4 mini is the premium intelligence choice, scoring 3.7% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: kimi-k2.5 is 1.4x 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 GPT-5.4 mini fully justifies the cost.

Model Specs

kimi-k2.5

Benchmarks & Scores

Coding (swe-bench-pro)
50.7%
Reasoning (gpqa-diamond)Winner (+0.1%)
87.6%

Cost & Performance

Cost (per 1M tokens)1.4x cheaper
$1.20Input: $0.60 | Output: $3.00
Speed
193 tps
Context Window
262.14k tokens
Model Specs

GPT-5.4 mini

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+3.7%)
54.4%
Reasoning (gpqa-diamond)
87.5%

Cost & Performance

Cost (per 1M tokens)
$1.69Input: $0.75 | Output: $4.50
Speed
201 tps
Context WindowLarger
400k tokens
Read our data collection methodology

Frequently Asked Questions

kimi-k2.5 is cheaper than GPT-5.4 mini. kimi-k2.5 has a blended cost of $1.20/1M tokens, which is about 1.4x cheaper than GPT-5.4 mini at $1.69/1M tokens.

GPT-5.4 mini is faster than kimi-k2.5. GPT-5.4 mini generates 201 tokens per second (tps) compared to kimi-k2.5 which generates 193 tokens per second.

GPT-5.4 mini is better for coding tasks. It scores 54.4% on coding evaluations (swe-bench-pro) compared to kimi-k2.5 which scores 50.7%.

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