OpenAI: GPT-6 Astra vs OpenAI: GPT-6 Luna
OpenAI: GPT-6 Luna is cheaper than OpenAI: GPT-6 Astra by about 99% on a blended (75% input / 25% output) basis. OpenAI: GPT-6 Astra charges $10.000000 / $50.000000 per 1M input/output tokens; OpenAI: GPT-6 Luna charges $0.100000 / $0.500000.
| Field | OpenAI: GPT-6 Astra | OpenAI: GPT-6 Luna |
|---|---|---|
| Input $/Mtok | $10.000000 | $0.100000 |
| Output $/Mtok | $50.000000 | $0.500000 |
| Cache read $/Mtok | $1.000000 | $0.010000 |
| Cache write $/Mtok | $12.500000 | $0.125000 |
| Input $/Mchar | 2.817139 | 0.028171 |
| Output $/Mchar | 14.085697 | 0.140857 |
| Context window | 1050000 | 1050000 |
| Tokenizer | o200k | o200k |
Price history
Same workload, monthly cost
Illustrative monthly cost at 10M tokens/month, split per workload preset. Not a substitute for the calculator, which uses your own volume, cache and batch assumptions.
| Workload | OpenAI: GPT-6 Astra | OpenAI: GPT-6 Luna |
|---|---|---|
| Coding agent | $120.00 | $1.20 |
| RAG chat | $160.00 | $1.60 |
| Summarisation (batch) | $140.00 | $1.40 |
| Classification | $108.00 | $1.08 |
| Chat assistant | $260.00 | $2.60 |
| Content generation | $420.00 | $4.20 |
Cite this page
OpenAI: GPT-6 Astra vs OpenAI: GPT-6 Luna: $10.000000/$50.000000 vs $0.100000/$0.500000 per 1M tokens, as of 2026-10-04 (Token Barometer, https://tokenbarometer.com/compare/openai_gpt-6-astra-vs-openai_gpt-6-luna).
OpenAI: GPT-6 Astra page | OpenAI: GPT-6 Luna page | Open in calculator