GPT-5.6 Luna · OpenAI
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GPT-5.6 Luna vs DeepSeek V4 Flash
OpenAI vs DeepSeek. Compare a low input rate with DeepSeek peak-hour pricing; off-peak is not assumed.
STALEThis historical quote is outside the configured verification window. Check the official source before use. Last successfully verified 2026-09-09 UTC.
PENDING REVIEWThis quote is awaiting review and is excluded from current comparisons and estimates. Last successfully verified 2026-09-08 UTC.
USD token-only estimates using each offering’s published default tier. 1M tokens are an aggregate workload, not a single request. Cache savings, batch discounts, long-context surcharges, tools, taxes and negotiated rates are excluded. Tokenizers and capabilities may differ; lower price does not establish equivalent quality.
Current cost comparison is paused because one or both quotes are not verified. The rates below are historical references, not current offers.
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| Metric | GPT-5.6 LunaOpenAI | DeepSeek V4 FlashDeepSeek |
|---|---|---|
| Input / 1M tokens | $0.20 | $0.44 |
| Output / 1M tokens | $1.20 | $1.32 |
| Cached input / 1M | $0.02 | $0.014 |
| Context window | 1,050,000 | 1,000,000 |
| Maximum output | 128,000 | 384,000 |
| 1M input + 1M output | Paused | Paused |
| Default pricing basis | standard | peak |
| Last verified (UTC) | 2026-09-09T01:36:53.737Z | 2026-09-08T10:18:11.171Z |
Official sources and pricing scope
DeepSeek V4 Flash · DeepSeek
DeepSeek V4 Flash
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