GPT Luna Latest vs Muse Spark 1.3 Contributor: cost comparison
Prices updated 2026-10-27 · computed from live provider data
Short answer: Muse Spark 1.3 Contributor is cheaper on a
3:1 input/output blend — $0.125 per million tokens versus
$0.200, a 38% difference.
GPT Luna Latest offers the larger context window at 1,050,000 tokens, against 1,048,576 for Muse Spark 1.3 Contributor.
Head to head
| GPT Luna Latest | Muse Spark 1.3 Contributor | |
|---|---|---|
| Input, per 1M tokens | $0.100 | $0.100 |
| Output, per 1M tokens | $0.500 | $0.200 |
| Blended 3:1, per 1M | $0.200 | $0.125 |
| Context window | 1,050,000 | 1,048,576 |
| Vendor | ~openai | meta |
Monthly cost at real volumes
| Workload (input / output) | GPT Luna Latest | Muse Spark 1.3 Contributor |
|---|---|---|
| 1M in / 250K out | $0.225 | $0.150 |
| 10M in / 2.5M out | $2.25 | $1.50 |
| 100M in / 25M out | $22.50 | $15.00 |
Which should you pick?
Pick GPT Luna Latest when you need the longer context window (1,050,000 vs 1,048,576 tokens). Pick Muse Spark 1.3 Contributor when price per token dominates your workload — high-volume classification, extraction, or batch summarisation.