GPT-5.6 Luna vs GPT-5.6 Sol
GPT-5.6 Luna is about 17.8× cheaper than GPT-5.6 Sol on blended token cost ($0.45 vs $8 per 1M). GPT-5.6 Luna (OpenAI) is $0.45/1M blended, 1.1M context. GPT-5.6 Sol (OpenAI) is $8/1M blended, 1.1M context.
Last verified: 26 Sep 2026 · prices from official provider documentation
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| Spec | GPT-5.6 Luna | GPT-5.6 Sol |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Status | GA | GA |
| Input $/1M | $0.2 ◎ | $4 |
| Output $/1M | $1.20 ◎ | $20 |
| Blended $/1M | $0.45 ◎ | $8 |
| Context | 1.1M | 1.1M |
| Max output | 128K | 128K |
| Cutoff | 2026-02-16 | 2026-02-16 |
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- DeprecatingGoogle re-pointed the Gemini 2.5 TTS migration path past the 3.1 preview and onto the new GA 3.8 TTS models
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