GPT-5.6 Luna pricing
GPT-5.6 Luna costs $1.00 per 1M input tokens and $6.00 per 1M output tokens as of September 2026. Tracked daily since 29 June 2026 across 74 snapshots.
Current rates
- Input: $1.00 per 1M tokens
- Output: $6.00 per 1M tokens
- Cached input: $0.10 per 1M tokens
- Context window: 1,000,000 tokens
Recorded changes
| Date | Field | From | To |
|---|---|---|---|
| 26 Jul 2026 | context | 400000 | 1000000 |
| 26 Jul 2026 | status | beta | active |
Cheaper alternatives to GPT-5.6 Luna
Ranked by blended cost assuming a 3:1 input-to-output ratio, which is typical of chat and agent workloads. Only currently callable models with a comparable context window are listed.
| Model | Input / 1M | Output / 1M | Cheaper by |
|---|---|---|---|
| Muse Spark 1.3 | $1.25 | $4.25 | 11% |
| Claude Haiku 4.5 | $1.00 | $5.00 | 11% |
| Kimi K2.6 | $0.95 | $4.00 | 24% |
| GPT-5.4 mini | $0.75 | $4.50 | 25% |
| Grok 4.3 | $1.25 | $2.50 | 31% |