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Moonshot AI (Kimi)

kimi-k2.5

VS
OpenAI

GPT-5.4 Pro

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, kimi-k2.5 is the premium intelligence choice, scoring 50.7% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: GPT-5.4 Pro is 8.7x cheaper to run. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, GPT-5.4 Pro offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of kimi-k2.5 fully justifies the cost.

Model Specs

kimi-k2.5

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
50.7%
Reasoning (gpqa-diamond)Winner (+20.0%)
87.6%

Cost & Performance

Cost (per 1M tokens)
$1.20Input: $0.60 | Output: $3.00
Speed1.4x faster
193 tps
Context Window
262.14k tokens
Model Specs

GPT-5.4 Pro

Benchmarks & Scores

Coding (swe-bench-pro)
N/A
Reasoning (gpqa-diamond)
67.6%

Cost & Performance

Cost (per 1M tokens)8.7x cheaper
$0.14Input: $0.05 | Output: $0.40
Speed
137 tps
Context WindowLarger
400k tokens
Read our data collection methodology

Frequently Asked Questions

GPT-5.4 Pro is cheaper than kimi-k2.5. GPT-5.4 Pro has a blended cost of $0.14/1M tokens, which is about 8.7x cheaper than kimi-k2.5 at $1.20/1M tokens.

kimi-k2.5 is faster than GPT-5.4 Pro. kimi-k2.5 generates 193 tokens per second (tps) compared to GPT-5.4 Pro which generates 137 tokens per second.

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

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