GPT-5.4 vs Kimi K2
Both models are evenly matched
Arena ELO
GPT-5.4
Cheaper
Kimi K2
Faster
Tie
Detailed Comparison
| Category | GPT-5.4 | Kimi K2 |
|---|---|---|
| Provider | OpenAI | Moonshot |
| Context Window | 1M WIN | 128K |
| Input Price ($/1M) | $3 | $0.55 WIN |
| Output Price ($/1M) | $15 | $2.2 WIN |
| Arena ELO | 1560 WIN | 1380 |
| Coding | unknown | 65.8% SWE-bench |
| Reasoning | unknown | 60.2% BrowseComp |
| Speed (tokens/sec) | ~50 t/s | ~50 t/s |
| Open Source | No | Yes |
Frequently Asked Questions
Which is cheaper, GPT-5.4 or Kimi K2?
Kimi K2 is approximately 85% cheaper than GPT-5.4 per million tokens.
Which is better for coding, GPT-5.4 or Kimi K2?
GPT-5.4 scores unknown on coding benchmarks, while Kimi K2 scores 65.8% SWE-bench.
Which has a larger context window?
GPT-5.4 supports 1M context, while Kimi K2 supports 128K.
Is GPT-5.4 or Kimi K2 open source?
GPT-5.4 is proprietary. Kimi K2 is open source.
Which ranks higher on the Chatbot Arena leaderboard?
GPT-5.4 ranks higher with ELO 1560 vs 1380.
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