GPT-5.4 vs GPT-5.6 Luna
GPT-5.4 leads in 5 of 8 categories
Arena ELO
GPT-5.4
Cheaper
GPT-5.4
Faster
GPT-5.4
Detailed Comparison
| Category | GPT-5.4 | GPT-5.6 Luna |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Context Window | 1M WIN | 128K |
| Input Price ($/1M) | $2.5 WIN | $10 |
| Output Price ($/1M) | $15 WIN | $30 |
| Arena ELO | 1560 WIN | N/A |
| Coding | unknown | N/A |
| Reasoning | unknown | N/A |
| Speed (tokens/sec) | ~50 t/s WIN | N/A |
| Open Source | No | No |
Frequently Asked Questions
Which is cheaper, GPT-5.4 or GPT-5.6 Luna?
GPT-5.4 is approximately 56% cheaper than GPT-5.6 Luna per million tokens.
Which is better for coding, GPT-5.4 or GPT-5.6 Luna?
GPT-5.4 scores unknown on coding benchmarks, while GPT-5.6 Luna scores N/A.
Which has a larger context window?
GPT-5.4 supports 1M context, while GPT-5.6 Luna supports 128K.
Is GPT-5.4 or GPT-5.6 Luna open source?
GPT-5.4 is proprietary. GPT-5.6 Luna is proprietary.
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